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Title: Precision tests of fundamental physics with η and η ' mesons

Journal Article · · Physics Reports
 [1]; ORCiD logo [2];  [3];  [4]
  1. University of North Carolina, Wilmington, NC (United States)
  2. Univ. Bonn (Germany). Helmholtz-Inst. für Strahlen- und Kernphysik (Theorie), Bethe Center for Theoretical Physics
  3. Indiana Univ., Bloomington, IN (United States); Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Theory Center
  4. York Univ., Toronto, ON (Canada)
+ Show Author Affiliations

Decays of the neutral and long-lived $$\eta$$ and $$\eta'$$ mesons provide a unique, flavor-conserving laboratory to test low-energy Quantum Chromodynamics and search for new physics beyond the Standard Model. They have drawn world-wide attention in recent years and have inspired broad experimental programs in different high-intensity-frontier centers. Additionally, new experimental data will offer critical inputs to precisely determine the light quark mass ratios, $$\eta$$-$$\eta'$$ mixing parameters, and hadronic contributions to the anomalous magnetic moment of the muon. At the same time, it will provide a sensitive probe to test potential new physics. This includes searches for hidden photons, light Higgs scalars, and axion-like particles that are complementary to worldwide efforts to detect new light particles below the GeV mass scale, as well as tests of discrete symmetry violation. In this review, we give an update on theoretical developments, discuss the experimental opportunities, and identify future research needed in this field.

Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1847039
Report Number(s):
JLAB-THY-20-3219; DOE/OR/23177-4996; arXiv:2007.00664
Journal Information:
Physics Reports, Journal Name: Physics Reports Vol. 945; ISSN 0370-1573
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (684)

Renormalization of Chiral Perturbation Theory to Order p6 journal February 2000
The Strong CP Problem and Axions book January 2008
Neutral decays of the ?-meson journal September 1984
Hadronic decays of ? and ?? in the large-N limit journal September 1989
Limits on neutral light scalar and pseudoscalar particles in a proton beam dump experiment journal September 1991
The decaysK S 0 ??? andK L 0 ??? in the chiral approach journal September 1987
A measurement of the ?0, ? and ?? electromagnetic form factors journal September 1991
Two schemes of????-mixing journal December 1993
Chiral perturbation theory for anomalous processes journal December 1990
Energy and momentum in chiral theories journal June 1991
Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η journal September 1990
Rare decay modes of the neutral pion journal June 1984
Radiative corrections to pseudoscalar meson decays journal June 1983
Isospin breaking in chiral perturbation theory and the decaysη →πℓν andτ →ηπν journal March 1995
Measurement of the two-photon widths of thea 2,η′, η journal December 1990
Neutral decays ofη′(958) journal December 1987
New dispersion relations and their application to partial-wave amplitudes journal November 1973
The electromagnetic structure and alternative decay modes of the π0 journal December 1960
On the solution of certain singular integral equations of quantum field theory journal April 1958
The decay $$\eta \to \pi ^0 e^ + e^ - $$ withC conservationwithC conservation journal April 1967
A new measurement of the π0 lifetime through the Primakoff effect in nuclei journal March 1970
A PCAC puzzle: π0→γγ in the σ-model journal March 1969
Remark on theπ 0 → 3γ decay journal February 1967
Improving the hadron physics of non-Standard-Model decays: example bounds on R-parity violation journal January 2013
The QCD axion, precisely journal January 2016
Fermionic extensions of the Standard Model in light of the Higgs couplings journal January 2016
CP violation in η muonic decays journal January 2019
Measurement of the e+e−→ ηπ+π− cross section with the CMD-3 detector at the VEPP-2000 collider journal January 2020
Rescattering effects in η → 3π decays journal February 2011
Phenomenology of a very light scalar (100 MeV < m h < 10 GeV) mixing with the SM Higgs journal February 2014
A model-independent analysis of final-state interactions in B ¯ d / s 0 → J / ψ π π $$ {\overline{B}}_{d/s}^0\to J/\psi \pi \pi $$ journal February 2016
ALPtraum: ALP production in proton beam dump experiments journal February 2016
Two-pion contribution to hadronic vacuum polarization journal February 2019
A taste of dark matter: flavour constraints on pseudoscalar mediators journal March 2015
How to employ B ¯ d 0 → J / ψ π η , K ¯ K $$ {\overline{B}}_d^0\to J/\psi \left(\uppi \eta, \overline{K}K\right) $$ decays to extract information on πη scattering journal April 2017
Dispersion relation for hadronic light-by-light scattering: two-pion contributions journal April 2017
Light gauge boson interpretation for (g − 2)μ and the KL→ π0 + (invisible) anomaly at the J-PARC KOTO experiment journal April 2020
Light inflaton hunter’s guide journal May 2010
Chiral dynamics predictions for η′ → ηππ journal May 2011
Precision measurement of the η → π + π − π 0 Dalitz plot distribution with the KLOE detector journal May 2016
Light weakly coupled axial forces: models, constraints, and projections journal May 2017
QCD θ-vacuum energy and axion properties journal May 2020
Roy-Steiner equations for pion-nucleon scattering journal June 2012
ALPs at colliders journal June 2015
Scrutinizing the η-η′ mixing, masses and pseudoscalar decay constants in the framework of U(3) chiral effective field theory journal June 2015
Serendipity in dark photon searches journal June 2018
Pseudoscalar pole light-by-light contributions to the muon (g − 2) in resonance chiral theory journal June 2018
Hunting all the hidden photons journal July 2018
Dispersion relations for γ∗γ∗ → ππ: helicity amplitudes, subtractions, and anomalous thresholds journal July 2019
On the interplay between astrophysical and laboratory probes of MeV-scale axion-like particles journal July 2020
Light dark sectors through the Fermion portal journal July 2020
New constraints (and motivations) for abelian gauge bosons in the MeV-TeV mass range journal August 2011
η and η ′ decays into lepton pairs journal August 2016
Three-pion contribution to hadronic vacuum polarization journal August 2019
Combined analysis of the decays τ − → K S π − ν τ and τ − → K − ην τ journal September 2014
Dispersive approach to hadronic light-by-light scattering journal September 2014
Dispersion relation for hadronic light-by-light scattering: theoretical foundations journal September 2015
Dimension-six terms in the Standard Model Lagrangian journal October 2010
Two-loop QED radiative corrections to the decay π 0 → e + e −: the virtual corrections and soft-photon bremsstrahlung journal October 2011
τ − →K − η (′) ν τ decays in Chiral Perturbation Theory with resonances journal October 2013
Dispersion-theoretical analysis of the D + → K − π + π + Dalitz plot journal October 2015
Dispersion relation for hadronic light-by-light scattering: pion pole journal October 2018
η and η′ mesons from N f  = 2 + 1 + 1 twisted mass lattice QCD journal November 2012
Possible explanation of the electron positron anomaly at 17 MeV in 8 Be transitions through a light pseudoscalar journal November 2016
Effective-field theory analysis of the τ − → η(′)π−ντ decays journal December 2017
Collider probes of axion-like particles journal December 2017
Search for a new light gauge boson in $\pi^0$ , $\eta$ and $\eta^\prime$ decays journal March 1996
$N_f$ dependence of the quark condensate from a chiral sum rule journal May 2000
Large $N_ c$ in chiral perturbation theory journal December 2000
Comparison of $\pi K$ scattering in SU(3) chiral perturbation theory and dispersion relations journal March 2001
The anomalous chiral Lagrangian of order $p^6$ journal April 2002
One-channel Roy equations revisited journal August 1999
Experimental study of the processes $e^+e^-\rightarrow \phi \rightarrow \eta \gamma , \pi ^{0}\gamma$ at VEPP-2M journal January 2000
Large N chiral dynamics journal September 1980
Chiral perturbation theory to one loop journal November 1984
Derivation of strong interactions from a gauge invariance journal August 1961
The T violating decay of π° → 3γ journal May 1965
The η → π+ π0 π− decay with C - violation journal July 1965
Possibility of CP violation in semi-strong interactions journal March 1965
Current algebra and the decay η → 3 π journal November 1966
Chiral perturbation theory journal January 1995
Electromagnetic decays of light mesons journal November 1985
Nonlinear realization and hidden local symmetries journal July 1988
Low-energy hadron physics from effective chiral Lagrangians with vector mesons journal May 1988
Low-energy phenomenology of superstring-inspired E6 models journal November 1989
On CP violation in nuclear reactions journal March 1992
Consequences of anomalous ward identities journal November 1971
Exact integral equation for pion-pion scattering involving only physical region partial waves journal September 1971
Evidence against the existence of a low mass scalar boson from neutron-nucleus scattering journal July 1975
On time reversal violation in the nucleon-nucleon system journal September 1975
The structure of the gauge theory vacuum journal August 1976
Remarks on Higgs-boson interactions with nucleons journal October 1978
Chiral estimate of the electric dipole moment of the neutron in quantum chromodynamics journal December 1979
Observation of η′ → μ+μ−γ decay journal December 1979
Quark-lepton symmetry and B − L as the U(1) generator of the electroweak symmetry group journal April 1980
Study of η→μ+μ− decay journal December 1980
Q2-duality for electromagnetic form factors of mesons journal September 1981
Search for rare decays of η- and η′-mesons, and for light Higgs particles journal October 1981
τ → δν decay induced by light quark mass difference journal September 1982
Q2 duality and rare pion decays journal June 1983
A measurement of the η radiative width Γη→γγ journal October 1985
Search for axion-like particle production in 400 GeV proton-copper interactions journal July 1985
Technocosmology — could a technibaryon excess provide a “natural” missing mass candidate? journal December 1985
Direct measurement of the lifetime of the neutral pion journal August 1985
On anomalous electroweak baryon-number non-conservation in the early universe journal May 1985
Manifesting the invisible axion at low energies journal March 1986
Rare decay modes of the K-mesons in the chiral lagrangian journal July 1986
Effects of η′ in low-energy axion physics journal November 1986
Two U(1)'s and ϵ charge shifts journal January 1986
A search for decays of heavy neutrinos in the mass range 0.5–2.8 GeV journal January 1986
Search for neutrino decay journal January 1986
“Anomalous” eta production in tau decay journal October 1987
Weak decays of strongly decaying mesons journal March 1988
An unambiguous search for a light Higgs boson journal October 1989
Constraints on a new vector boson coupled to baryons journal April 1989
The decays Z → Wπ, Z → γπ, and the pion form factor journal July 1990
Three-pseudoscalar photon interactions in chiral perturbation theory journal March 1990
e+e− annihilation into hadrons and exclusive τ decays journal March 1991
Chiral perturbation theory for η→π0γγ journal February 1992
The rare decays π0→e+e−, η→e+e− and η→μ+μ− in chiral perturbation theory journal October 1992
The axial anomaly and the dynamical breaking of chiral symmetry in the reaction journal August 1992
Search for a new light gauge boson in decays of π0 and η journal July 1994
Is there a vector boson coupling to baryon number? journal March 1995
On the four-photon decay of the neutral pion journal October 1995
The off-shell axial anomaly via the transition journal October 1995
Dispersive analysis of the decay η → 3π journal May 1996
The ratios of the light quark masses journal June 1996
Baryonic Z′ connection of LEP Rb,c data with Tevatron events journal July 1996
Electromagnetic pion form factor and neutral pion decay width journal August 1996
Phenomenological Lagrangians journal April 1979
Current algebra and η → 3π journal January 1968
η-X mixing, η→3π and chiral lagrangians journal June 1970
Coherent production in the nuclear Coulomb field journal June 1972
Implications of scaling for the proton-neutron mass difference journal August 1975
A phenomenological profile of the Higgs boson journal April 1976
Current algebra theorems for the U(1) “Goldstone boson” journal September 1979
U(1) without instantons journal November 1979
Scalar one-loop integrals journal January 1979
The η problem in the large-N limit: Effective Lagrangian approach journal December 1980
Can confinement ensure natural CP invariance of strong interactions? journal April 1980
Chiral dynamics in the large N limit journal January 1980
A la recherche d'un nouveau boson de spin un journal August 1981
Large N, chiral approach to pseudoscalar masses, mixings and decays journal April 1981
The decay journal March 1982
Global aspects of current algebra journal August 1983
The quark triangle: Application to pion and eta decays journal November 1983
Chiral perturbation theory: Expansions in the mass of the strange quark journal January 1985
η → 3π to one loop journal January 1985
Effective lagrangian analysis of new interactions and flavour conservation journal May 1986
The role of resonances in chiral perturbation theory journal July 1989
The decay of a light Higgs boson journal October 1990
Light Higgs particle in decays of K and η mesons journal October 1990
Strong CP-violation in an effective chiral lagrangian approach journal December 1991
What do we know in fact about T-odd, but P-even interactions? journal March 1991
The low energy ππ amplitude to one and two loops journal December 1995
η → π0γγ to O(p6) in chiral perturbation theory journal January 1996
Electromagnetic corrections to the decays η → 3π journal January 1996
Final state interactions and Khuri-Treiman equations in,ν → 3π decays journal April 1996
The BABAR detector
  • Aubert, B.; Bazan, A.; Boucham, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02012-5
journal February 2002
The Belle detector
  • Abashian, A.; Gotow, K.; Morgan, N.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02013-7
journal February 2002
The CEBAF large acceptance spectrometer (CLAS)
  • Mecking, B. A.; Adams, G.; Ahmad, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, Issue 3 https://doi.org/10.1016/S0168-9002(03)01001-5
journal May 2003
Cooler synchrotron COSY — Performance and perspectives journal May 1997
Roy equation analysis of ππ scattering journal November 2001
Hidden local symmetry at loop journal July 2003
The phenomenology of extra neutral gauge bosons journal August 1999
The process e+e−→ωπ0→π0π0γ up to 1.4 GeV journal July 2000
The ππ S-wave scattering lengths journal September 2000
Search for heavy neutrinos mixing with tau neutrinos journal May 2001
Study of the process e+e−→ηγ in c.m. energy range 600–1380 MeV at CMD-2 journal June 2001
The muon anomalous magnetic moment and a new light gauge boson journal July 2001
Anomalous C-violating three photon decay of the neutral pion in noncommutative quantum electrodynamics journal November 2001
Experimental study of the e+e−→π0γ process in the energy region s=0.60–0.97 GeV journal May 2003
Study of the decay φ→π+π−π0 with the KLOE detector journal May 2003
Study of the process e+e−→ωπ0→π0π0γ in c.m. energy range 920–1380 MeV at CMD-2 journal June 2003
Chiral-loop and vector-meson contributions to η → ππγγ decays journal May 1997
Measurement of the decay distribution of η′ → π+π−γ and evidence for the box anomaly journal June 1997
η — η′ glueball mixing from photon-meson transition form factors and the decay ratio Ds → ηlv/η′lv journal July 1997
The role of chiral loops in η → π0π0γγ journal July 1997
Measurement of η′(958) formation in two-photon collisions at LEP1 journal February 1998
Momentum dependence of the decay η→π+π−π0 journal January 1998
η−η′ mixing from U(3)L⊗U(3)R chiral perturbation theory journal February 1998
On search for a new light gauge boson from π0(η)→γ+X decays in neutrino experiments journal May 1998
Limits on a light leptophobic gauge boson journal December 1998
Mixing and decay constants of pseudoscalar mesons: the sequel journal March 1999
Study of the radiative decay φ→ηγ with CMD-2 detector journal August 1999
η→π+π−π0γ in chiral perturbation theory journal November 1999
An isobar model for η photo- and electroproduction on the nucleon journal March 2002
Theoretical study of the γγ → meson-meson reaction journal February 1998
The quark-photon vertex and meson electromagnetic form factors journal January 2000
S-wave scattering in chiral perturbation theory with resonances journal October 2000
Search for the radiative decay η→π0γγ in the SND experiment at VEPP-2M journal April 2001
ππ scattering journal June 2001
Chiral effective lagrangian in the large-Nc limit: the nonet case journal July 1997
On the in chiral perturbation theory journal May 1998
Electric dipole moments as probes of new physics journal July 2005
The effective chiral Lagrangian from dimension-six parity and time-reversal violation journal November 2013
CIMBA: Fast Monte Carlo generation using cubic interpolation journal January 2021
The GlueX beamline and detector
  • Adhikari, S.; Akondi, C. S.; Al Ghoul, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 987 https://doi.org/10.1016/j.nima.2020.164807
journal January 2021
η,η′→π+π−γ with coupled channels journal August 2004
Precision calculation of threshold scattering, πN scattering lengths, and the GMO sum rule journal December 2011
The time-reversal- and parity-violating nuclear potential in chiral effective theory journal December 2011
Scalar dark matter candidates journal April 2004
Cusps in decays: A theoretical framework journal September 2011
Eta decay and muonic puzzles journal July 2019
Hadronic contributions to αμ below one GeV journal April 2004
A search for rare and forbidden decays of η-meson with GAMS-4π journal December 2006
Physics and Detectors for VEPP-2000 journal September 2008
η and η' physics at MAMI journal January 2010
A preliminary analysis of η(η′)→π0γγ and η′→ηγγ decays journal October 2010
The two-photon physics program at BESIII journal June 2017
New-physics searches in CP -violating η muonic decays journal July 2021
A Stueckelberg extension of the Standard Model journal April 2004
Upper limit on the η→γγγ branching ratio with the KLOE detector journal July 2004
Study of the processes e+e−→ηγ, π0γ→3γ in the c.m. energy range 600–1380 MeV at CMD-2 journal January 2005
Upper limit on the η→π+π− branching ratio with the KLOE detector journal January 2005
The νMSM, inflation, and dark matter journal August 2006
Study of ϕ→π+π−π0 with CMD-2 detector journal November 2006
On the extraction of the quark mass ratio (md−mu)/ms from Γ(η′→π0π+π−)/Γ(η′→ηπ+π−) journal November 2006
Measurement of the η→π+π−e+e− decay branching ratio journal January 2007
High-statistics measurement of the pion form factor in the ρ-meson energy range with the CMD-2 detector journal April 2007
Axial anomaly and the precise value of the π0→2γ decay width journal April 2007
Search for lepton flavor violating τ− decays into ℓ−η, ℓ−η′ and ℓ−π0 journal May 2007
Study of Dalitz plot journal July 2007
Cusps in KL→3π decays journal January 2008
Secluded WIMP dark matter journal April 2008
Astrophysical signatures of secluded dark matter journal January 2009
Precise measurement of hadronic τ-decays with an η meson journal February 2009
Measurement of the η→3π0 Dalitz plot distribution with the WASA detector at COSY journal June 2009
Measurement of the branching ratio and search for a CP violating asymmetry in the η→π+π−e+e−(γ) decay at KLOE journal May 2009
Study of the electromagnetic transition form-factors in η→μ+μ−γ and ω→μ+μ−π0 decays with NA60 journal June 2009
Complete structure-dependent analysis of the decay P→l+l− journal June 2009
Electromagnetic transition form factors of light vector mesons journal August 2010
Measurement of the η→3π0 slope parameter α with the KLOE detector journal October 2010
Precision calculation of the π−d scattering length and its impact on threshold πN scattering journal January 2011
Measurement of σ(e+e−→π+π−) from threshold to 0.85 GeV2 using initial state radiation with the KLOE detector journal June 2011
New exclusion limits for dark gauge forces from beam-dump data journal July 2011
Determination of the η-transition form factor in the γp→pη→pγe+e− reaction journal July 2011
Observation of the rare η→e+e−e+e− decay with the KLOE experiment journal August 2011
Dynamical light vector mesons in low-energy scattering of Goldstone bosons journal September 2011
Model-independent approach to η→π+π−γ and η′→π+π−γ journal January 2012
Exclusive measurement of the η→π+π−γ decay journal January 2012
Precision probes of a leptophobic Z′ boson journal June 2012
Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays journal July 2012
Measurement of Γ(η→π+π−γ)/Γ(η→π+π−π0) with the KLOE detector journal January 2013
Limit on the production of a light vector gauge boson in ϕ meson decays with the KLOE detector journal March 2013
Precision measurement of σ(e+e−→π+π−γ)/σ(e+e−→μ+μ−γ) and determination of the π+π− contribution to the muon anomaly with the KLOE detector journal March 2013
New stellar constraints on dark photons journal October 2013
Constraints on light mediators: Confronting dark matter searches with B physics journal December 2013
New exclusion limits on dark gauge forces from proton Bremsstrahlung in beam-dump data journal April 2014
Searching a dark photon with HADES journal April 2014
Baryonic dark matter journal May 2014
Nucleon electric dipole moments and the isovector parity- and time-reversal-odd pion–nucleon coupling journal September 2014
Search for light vector boson production in e + e − → μ + μ − γ interactions with the KLOE experiment journal September 2014
Towards a data-driven analysis of hadronic light-by-light scattering journal November 2014
Unbroken B – L symmetry journal December 2014
Search for the process e + e − → η ′ ( 958 ) with the CMD-3 detector journal January 2015
Odd and even partial waves of η π − and η ′ π − in π − p → η ( ′ ) π − p at 191 GeV / c journal January 2015
Study of the Dalitz decay ϕ → ηe + e − with the KLOE detector journal March 2015
Search for the dark photon in π 0 decays journal June 2015
Chiral power counting of one- and two-body currents in direct detection of dark matter journal June 2015
Limit on the production of a low-mass vector boson in e + e − → U γ , U → e + e − with the KLOE experiment journal November 2015
Measurement of the e+e−→π+π− cross section between 600 and 900 MeV using initial state radiation journal February 2016
Probing MeV to 90 GeV axion-like particles with LEP and LHC journal February 2016
Precision study of the η → μ + μ − γ and ω → μ + μ − π 0 electromagnetic transition form-factors and of the ρ → μ + μ − line shape in NA60 journal June 2016
Measurement of the ϕ → π 0 e + e − transition form factor with the KLOE detector journal June 2016
Search for the CP-violating strong decays η→π+π− and η′(958)→π+π− journal January 2017
Measurement of the π 0 electromagnetic transition form factor slope journal May 2017
Measurement of the ω → π + π − π 0 Dalitz plot distribution journal July 2017
Spin-dependent μ→e conversion journal August 2017
Three-body final state interaction in η→ 3π updated journal August 2017
Can nuclear physics explain the anomaly observed in the internal pair production in the Beryllium-8 nucleus? journal October 2017
On the large- Q 2 behavior of the pion transition form factor journal November 2017
Consistent Dalitz plot analysis of Cabibbo-favored D + → K ¯ π π + decays journal May 2018
Protecting the axion with local baryon number journal May 2018
Search for C violation in the decay η → π0e+e− with WASA-at-COSY journal September 2018
Combined limit on the production of a light gauge boson decaying into μ+μ− and π+π− journal September 2018
Dispersive analysis of the γγ⁎ → ππ process journal February 2019
Single pseudoscalar meson pole and pion box contributions to the anomalous magnetic moment of the muon journal October 2019
High precision measurement of Compton scattering in the 5 GeV region journal October 2019
The muon g−2 journal June 2009
Asymmetric Dark Matter: Theories, signatures, and constraints journal April 2014
Roy–Steiner-equation analysis of pion–nucleon scattering journal April 2016
Dark matter self-interactions and small scale structure journal February 2018
The anomalous magnetic moment of the muon in the Standard Model journal December 2020
Chiral perturbation theory beyond one loop journal April 2007
Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond journal July 2013
Searching in the dark: the hunt for the dark photon journal November 2020
The size of the proton journal July 2010
Determination of the fine-structure constant with an accuracy of 81 parts per trillion journal December 2020
Study of the η → e + e − γ Decay Using WASA-at-COSY Detector System journal January 2012
η and η′ Physics at MAMI journal January 2014
Test of fundamental symmetries via the Primakoff effect journal January 2014
Studies on η meson production and the C -parity violating decay η → π 0 e + e − with WASA-at-COSY journal January 2016
Light meson decays from photon-induced reactions with CLAS journal January 2016
The End Point Tagger physics program at A2@MAMI journal January 2017
KLOE Results on Hadron Physics and Perspectives for KLOE-2 journal January 2018
The γγ Physics Program at BESIII journal January 2018
η meson physics with WASA-at-COSY journal January 2019
Dielectron pairs from η meson decays at WASA detector journal January 2019
Measurement of the γ * γ * → η ' transition form factor and of the e + e − → π + π − π 0 π 0 π 0 and π + π − π 0 π 0 η cross sections by BABAR journal January 2019
Measurement of the Time-like Pion Transition Form Factor at BESIII journal January 2019
Search for dark forces at KLOE-2 journal January 2019
Dispersive analysis of light-meson transition form factors journal January 2019
Recent Results on Meson Decays from A2 journal January 2019
γγ Physics and Transition Form Factors with KLOE/KLOE2 journal January 2019
The GlueX Experiment conference January 2006
The GlueX Detector
  • Lawrence, D.; Marshak, Marvin L.
  • 10TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS, AIP Conference Proceedings https://doi.org/10.1063/1.3293933
conference January 2009
Extraction of resonance parameter conference January 2012
The decays η→πeνe and η→πμνμ conference January 1992
Higgs particles journal August 1980
Chiral perturbation theory journal June 1995
A facility to search for hidden particles at the CERN SPS: the SHiP physics case journal October 2016
Photoproduction of leptophobic bosons journal December 2016
The mesonic chiral lagrangean of order p 6 journal February 1999
Zweig rule violation in the scalar sector and values of low-energy constants journal March 2001
Electromagnetic corrections in the anomaly sector journal May 2002
Study of the η - η′ system in the two mixing angle scheme journal June 2005
η→3π at two loops in Chiral Perturbation Theory journal November 2007
Rare decays with a light CP -odd Higgs Boson in the NMSSM journal June 2008
Lepton flavour violating semileptonic τ decays in constrained MSSM-seesaw scenarios journal June 2008
Searching for the light dark gauge boson in GeV-scale experiments journal July 2009
Naturally light hidden photons in LARGE volume string compactifications journal November 2009
Physics beyond colliders at CERN: beyond the Standard Model working group report journal December 2019
Long-lived particles at the energy frontier: the MATHUSLA physics case journal October 2019
On relating the genesis of cosmic baryons and dark matter journal September 2012
Thermal relics in hidden sectors journal October 2008
Hidden charged dark matter journal July 2009
Exploring ν signals in dark matter detectors journal July 2012
Solar constraints on hidden photons re-visited journal August 2013
Extended gamma-ray emission from Coy Dark Matter journal May 2014
Robust cosmological constraints on axion-like particles journal May 2020
A data-driven approach to ${{\rm{\pi }}}^{0},{\rm{\eta }}$ and ${{\rm{\eta }}}^{\prime}$ single and double Dalitz decays journal January 2018
An overview of η and η′ decays at BESIII journal April 2018
Future Physics Programme of BESIII journal April 2020
Study of ŋ-meson Decays at KLOE/KLOE-2 journal August 2020
Tests of the fundamental symmetries in η meson decays journal December 2011
Status and prospects of the Belle II experiment journal June 2015
Detecting physics beyond the Standard Model with the REDTOP experiment journal October 2017
Experimental Test of Parity Conservation in Beta Decay journal February 1957
Experimental Limit to the Electric Dipole Moment of the Neutron journal October 1957
Charge Symmetry of Weak Interactions journal November 1958
Pion-Pion Scattering and K ± → 3 π Decay journal August 1960
Asymptotic Behavior and Subtractions in the Mandelstam Representation journal August 1961
Unitarity and High-Energy Behavior of Scattering Amplitudes journal February 1963
Photoproduction of Neutral Pions from Complex Nuclei journal February 1964
Consistency Conditions on the Strong Interactions Implied by a Partially Conserved Axial-Vector Current journal February 1965
Analysis of CP -Noninvariant Interactions and the K 1 0 , K 2 0 System journal June 1965
Possible C -Noninvariant Effects in the 3 π Decay Modes of η 0 and ω 0 journal September 1965
Possible C , T Noninvariance in the Electromagnetic Interaction journal September 1965
Weak-Interaction Decays of η Meson journal July 1965
Consequences of C -Violating Interactions in η 0 and X 0 Decays journal January 1966
Three-Body Unitarity and Khuri-Treiman Amplitudes journal December 1966
Phenomenological Model of Strong and Weak Interactions in Chiral U ( 3 ) ⊗ U ( 3 ) journal September 1967
C -Conserving Decay η → π 0 e + e − in a Vector-Meson-Dominant Model journal October 1967
Chiral Transformations journal March 1968
Khuri-Treiman-Type Equations for Three-Body Decay and Production Processes journal June 1968
Behavior of Current Divergences under SU 3 × SU 3 journal November 1968
Axial-Vector Vertex in Spinor Electrodynamics journal January 1969
Chiral SU ( 3 ) ⊗ SU ( 3 ) as a Symmetry of the Strong Interactions journal July 1969
Anomalous Ward Identities in Spinor Field Theories journal August 1969
On the Possibility of Electric Dipole Moments for Elementary Particles and Nuclei journal June 1950
Photo-Production of Neutral Mesons in Nuclear Electric Fields and the Mean Life of the Neutral Meson journal March 1951
Some General Relations between the Photoproduction and Scattering of π Mesons journal July 1954
Conservation of Heavy Particles and Generalized Gauge Transformations journal June 1955
Confirming the existence of the strong CP problem in lattice QCD with the gradient flow journal January 2021
Production of π° in the Coulomb field of nuclei by virtual photons from electron scattering journal April 1989
Strength of the ρ meson coupling to nucleons journal September 1994
Low-energy parity-violation and new physics journal June 1999
Dilepton spectra from decays of light unflavored mesons journal February 2000
Search for the forbidden decays η → 3 γ and η → π 0 γ and the rare decay η → π 0 π 0 γ γ journal September 2005
Measurement of the invariant-mass spectrum for the two photons from the η → π 0 γ γ decay journal July 2008
Predictions for the cusp in η → 3 π 0 decay journal February 2009
Measurement of the slope parameter α for the η → 3 π 0 decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C) journal March 2009
Photoproduction of pseudoscalar mesons off nuclei at forward angles journal November 2009
Fully self-consistent calculations of nuclear Schiff moments journal July 2010
Experimental study of the γ p → η p reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C) journal September 2010
Two-photon fusion in high-energy electron-nucleus scattering journal April 2011
Meson production in high-energy electron-nucleus scattering journal August 2012
New determination of the η transition form factor in the Dalitz decay η → e + e − γ with the Crystal Ball/TAPS detectors at the Mainz Microtron journal April 2014
New measurement of the rare decay η → π 0 γ γ with the Crystal Ball/TAPS detectors at the Mainz Microtron journal August 2014
Electric dipole moments: A global analysis journal March 2015
Measurements of branching ratios for η decays into charged particles journal December 2016
High-statistics measurement of the η → 3 π 0 decay at the Mainz Microtron journal June 2018
Dispersive analysis of the γ * γ * → π π process journal March 2020
Contribution of neutral pseudoscalar mesons to a μ HLbL within a Schwinger-Dyson equations approach to QCD journal April 2020
Dispersive construction of two-loop P → π π π ( P = K , η ) amplitudes journal April 2020
Constraints on long-lived light scalars with flavor-changing couplings and the KOTO anomaly journal April 2020
Patterns of C P violation from mirror symmetry breaking in the η → π + π − π 0 Dalitz plot journal June 2020
Deuteron EDM induced by C P -violating couplings of pseudoscalar mesons journal June 2020
Theoretical analysis of the doubly radiative decays η ( ′ ) → π 0 γ γ and η ′ → η γ γ journal August 2020
Pair production of dark particles in meson decays journal September 2020
Two-photon decays and transition form factors of π 0 , η , and η ′ in large- N c chiral perturbation theory journal October 2020
Implication of hidden sub-GeV bosons for the ( g − 2 ) μ , Be 8 − He 4 anomaly, proton charge radius, EDM of fermions, and dark axion portal journal November 2020
Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g − 2 Experiment journal April 2021
The U(1) problem journal June 1975
Estimate of the rate of the rare decay π 0 → 3 γ journal October 1975
Unitary analytic isobar model for the reaction nucleon-meson to nucleon-meson-meson journal June 1978
Light-quark masses and isospin violation journal April 1979
CP -nonconserving effects in quantum chromodynamics journal April 1979
η ′ ( 958 ) → 4 π decay in a broken-S U 6 × O 3 quark model journal January 1979
Experimental Determination of the Dalitz-Plot Distribution of the Decays η → π + π − π 0 and η → π + π − γ , and the Branching Ratio η → π + π − γ η → π + π − π 0 journal August 1970
Is the effective Lagrangian for quantum chromodynamics a σ model? journal June 1980
Exclusive processes in perturbative quantum chromodynamics journal November 1980
U(1) problem: Current algebra and the θ vacuum journal January 1981
Large-angle two-photon exclusive channels in quantum chromodynamics journal October 1981
General Treatment of the Breaking of Chiral Symmetry and Scale Invariance in the SU ( 3 )   σ Model journal June 1971
Formation of delta (980) and A 2 (1320) in photon-photon collisions journal April 1986
Tau decays involving the eta meson journal June 1987
Formation of the pseudoscalars π 0 , η , and η’ in the reaction γγ→γγ journal September 1988
New searches for the C -noninvariant decay π 0 →3γ and the rare decay π 0 →4γ journal October 1988
Search for neutral metastable penetrating particles produced in the SLAC beam dump journal December 1988
Electroweak interactions with gauged baryon and lepton numbers journal October 1989
Gauged baryon and lepton numbers journal October 1989
Branching ratios for decays of light Higgs bosons journal December 1989
Anomaly-free left-right-symmetric models with gauged baryon and lepton numbers journal March 1990
Measurement of the two-photon width of the η and η ′ mesons journal January 1990
π η scattering in QCD journal December 1991
Transition form factors in π 0 , η , and η ′ couplings to γ γ * journal February 1992
Decay of the η meson into π μ + μ − journal December 1992
Electromagnetic self-energies of pseudoscalar mesons and Dashen's theorem journal March 1993
What π − π scattering tells us about chiral perturbation theory journal May 1993
Study of η → π 0 γ γ decay using the quark-box diagram journal June 1993
π 0 → e + e − and η → μ + μ − decays reexamined journal October 1993
Effective hadron dynamics: From meson masses to the proton spin puzzle journal July 1993
Chiral theory calculation of η → π + π − e + e − journal October 1993
Direct and indirect CP violation in the decay K L → π + π − e + e − journal November 1993
Constraints on T -odd and P -even hadronic interactions from nucleon, nuclear, and atomic electric dipole moments journal September 1994
Measurement of the branching ratio for the decay η→ μ + μ − journal July 1994
Branching ratios for η l 3 in the standard model journal January 1995
Effective Lagrangian approach to the theory of η photoproduction in the N * (1535) region journal April 1995
Chiral sum rules for scrL ( 6 ) WZ parameters and its application to π 0 ,η,η’ decays journal May 1995
How large are the rates of the CP -violating η,η’→ππ decays? journal July 1995
Realistic models with a light U(1) gauge boson coupled to baryon number journal July 1995
ε′ and the decay η→ππ in a theory with both explicit and spontaneous CP violation journal December 1995
Rare decay η→ππγγ in chiral perturbation theory journal April 1996
Effective Lagrangians and parity-conserving time-reversal violation at low energies journal May 1996
Search for the decays η → μ e and η → e + e − journal June 1996
Photon-meson transition form factors γ π 0 , γ η , and γ η ′ at low and moderately high Q 2 journal March 1997
Transverse momentum and Sudakov effects in exclusive QCD processes: γ * γ π 0 form factor journal September 1997
Measurements of the meson-photon transition form factors of light pseudoscalar mesons at large momentum transfer journal January 1998
Implications of generalized Z − Z ′ mixing journal June 1998
Higgs boson decays to CP -odd scalars at the Fermilab Tevatron and beyond journal February 2001
Constraints on T -odd, P -even interactions from electric dipole moments, reexamined journal March 2001
Anomalous chiral perturbation theory meson Lagrangian to order p 6 reexamined journal February 2002
Hadronic light-by-light corrections to the muon g − 2 : The pion-pole contribution journal April 2002
Study of the process e + e − → π + π − π 0 in the energy region s from 0.98 to 1.38 GeV journal August 2002
Radiative corrections to double Dalitz decays: Effects on invariant mass distributions and angular correlations journal February 2003
η → π 0 γ γ decay within a chiral unitary approach journal April 2003
Study of Dalitz-Plot Distributions of the Decays η → π + π − π 0 and η → π + π − γ journal May 1973
Relative Decay Rates of η → π + π − π 0 , η → π + π − γ , η → π + π − π 0 γ and η → π + π − journal May 1973
Minimal spontaneously broken hidden sector and its impact on Higgs boson physics at the CERN Large Hadron Collider journal November 2005
Invisible quarkonium decays as a sensitive probe of dark matter journal November 2005
Final report of the E821 muon anomalous magnetic moment measurement at BNL journal April 2006
Two-photon contributions to e + e − → η γ and e + e − → η ′ γ journal September 2006
Constraints on light dark matter and U bosons, from ψ , Υ , K + , π ° , η and η ′ decays journal September 2006
Rare decay π 0 → e + e − : Theory confronts KTeV data journal June 2007
U -boson production in e + e − annihilations, ψ and Υ decays, and light dark matter journal June 2007
Measurement of η meson decays into lepton-antilepton pairs journal February 2008
Neutron scattering and extra-short-range interactions journal February 2008
Pion-pion scattering amplitude. III. Improving the analysis with forward dispersion relations and Roy equations journal March 2008
η → π 0 γ γ decay within a chiral unitary approach revisited journal April 2008
High-statistics study of the τ − → π − π 0 ν τ decay journal October 2008
Dispersive approach to chiral perturbation theory journal December 2008
A theory of dark matter journal January 2009
Dark matter and dark radiation journal January 2009
Chiral expansions of the π 0 lifetime journal April 2009
Study of the decay K + → π + ν ν ¯ in the momentum region 140 < P π < 199     MeV / c journal May 2009
Charmonium decays to γ π 0 , γ η , and γ η ′ journal June 2009
Remark on Baryon Conservation journal September 1973
Weak-Interaction Effects in η → π + π − γ journal December 1973
Model discriminating power of μ → e conversion in nuclei journal July 2009
High-statistics study of η π 0 production in two-photon collisions journal August 2009
New fixed-target experiments to search for dark gauge forces journal October 2009
Secluded U(1) below the weak scale journal November 2009
Exploring portals to a hidden sector through fixed targets journal November 2009
Searching for light dark matter in heavy meson decays journal August 2010
Pion-pion scattering amplitude. IV. Improved analysis with once subtracted Roy-like equations up to 1100 MeV journal April 2011
Muonic hydrogen and MeV forces journal May 2011
Dark matter models with uniquely spin-dependent detection possibilities journal June 2011
Observing a light dark matter beam with neutrino experiments journal October 2011
Two-photon form factors of the π 0 , η , and η ′ mesons in the chiral theory with resonances journal May 2012
ω → π 0 γ * and ϕ → π 0 γ * transition form factors in dispersion theory journal September 2012
Measurement of γ γ * → π 0 transition form factor at Belle journal November 2012
γ * γ → π 0 transition form factor at low energies from a model-independent approach journal November 2012
New limits on hidden photons from past electron beam dumps journal November 2012
Extracting the chiral anomaly from γ π → π π journal December 2012
Leading isospin breaking effects on the lattice journal June 2013
Coupling-mass mapping of dijet peak searches journal August 2013
New electron beam-dump experiments to search for MeV to few-GeV dark matter journal December 2013
η and η ′ transition form factors from rational approximants journal February 2014
B l 4 decays and the extraction of | V u b | journal March 2014
V V ′ P form factors in resonance chiral theory and the π − η − η ′ light-by-light contribution to the muon g − 2 journal April 2014
New weakly coupled forces hidden in low-energy QCD journal June 2014
Transition form factors γ * γ → η and γ * γ → η ′ in QCD journal October 2014
Leptophobic dark matter at neutrino factories journal December 2014
Analysis of the J / ψ → π 0 γ * transition form factor journal February 2015
Search for the η ′ → e + e − decay with the SND detector journal May 2015
Dispersive analysis of ω / ϕ → 3 π , π γ * journal May 2015
Testing the consistency of the ω π transition form factor with unitarity and analyticity journal July 2015
New bounds for axions and axion-like particles with keV-GeV masses journal July 2015
Constraints on dark photon from neutrino-electron scattering experiments journal August 2015
Invisible K L decays as a probe of new physics journal August 2015
Radiative corrections to the Dalitz decay π 0 → e + e − γ revisited journal September 2015
Revised experimental upper limit on the electric dipole moment of the neutron journal November 2015
Precision of a data-driven estimate of hadronic light-by-light scattering in the muon g − 2 : Pseudoscalar-pole contribution journal September 2016
Probing light thermal dark matter with a Higgs portal mediator journal October 2016
Lepton flavor violating quarkonium decays journal October 2016
Search for a dark vector gauge boson decaying to π + π − using η → π + π − γ decays journal November 2016
Contributions of axionlike particles to lepton dipole moments journal December 2016
C P -violating decays of the pseudoscalars η and η ′ and their connection to the electric dipole moment of the neutron journal February 2017
η − η ′ mixing in large- N c chiral perturbation theory journal March 2017
Pseudoscalar-pole contribution to the ( g μ − 2 ) : A rational approach journal March 2017
Leading isospin-breaking corrections to pion, kaon, and charmed-meson masses with twisted-mass fermions journal June 2017
Electromagnetic decays of the neutral pion journal July 2017
Dark forces coupled to nonconserved currents journal October 2017
Radiative resonance couplings in γ π → π π journal December 2017
Flavor-singlet meson decay constants from N f = 2 + 1 + 1 twisted mass lattice QCD journal March 2018
Radiative corrections to double-Dalitz decays revisited journal March 2018
Radiative corrections to the η ( ′ ) Dalitz decays journal May 2018
Measurement of the decay η ′ → π 0 π 0 η at MAMI journal July 2018
Review of Particle Physics journal August 2018
Dark sectors at the Fermilab SeaQuest experiment journal August 2018
Flavor-specific scalar mediators journal September 2018
Search for a dark photon in electroproduced e + e − pairs with the Heavy Photon Search experiment at JLab journal November 2018
Decay and detection of a light scalar boson mixing with the Higgs boson journal January 2019
Hadronic decays of a light Higgs-like scalar journal January 2019
Lattice computation of the electromagnetic contributions to kaon and pion masses journal February 2019
FASER’s physics reach for long-lived particles journal May 2019
Revisiting the dark photon explanation of the muon anomalous magnetic moment journal June 2019
η → γ γ Decay Width via the Primakoff Cross Section journal July 2008
New Measurement of the K + → π + ν ν ¯ Branching Ratio journal November 2008
Observation of η ′ Decays to π + π − π 0 and π + π − e + e − journal February 2009
New Precise Measurement of the Pion Weak Form Factors in π + → e + ν γ Decay journal July 2009
Determination of the Total Width of the η ′ Meson journal September 2010
Unified Origin for Baryonic Visible Matter and Antibaryonic Dark Matter journal November 2010
New Measurement of the π 0 Radiative Decay Width journal April 2011
Search for a New Gauge Boson in Electron-Nucleus Fixed-Target Scattering by the APEX Experiment journal November 2011
η and η ′ Mixing from Lattice QCD journal October 2013
Search at the Mainz Microtron for Light Massive Gauge Bosons Relevant for the Muon g − 2 Anomaly journal June 2014
Hidden GeV-Scale Interactions of Quarks journal August 2014
Search for a Dark Photon in e + e − Collisions at BaBar journal November 2014
Cosmological Relaxation of the Electroweak Scale journal November 2015
Observation of Anomalous Internal Pair Creation in Be 8 : A Possible Indication of a Light, Neutral Boson journal January 2016
Reduced Limit on the Permanent Electric Dipole Moment of Hg 199 journal April 2016
Proposed Inclusive Dark Photon Search at LHCb journal June 2016
Study of η and η ′ Photoproduction at MAMI journal May 2017
New Constraints on Light Vectors Coupled to Anomalous Currents journal October 2017
Observation of a Nonstrange Meson of Mass 959 MeV journal May 1964
Existence of a New Meson of Mass 960 MeV journal May 1964
Pion-Pole Contribution to Hadronic Light-By-Light Scattering in the Anomalous Magnetic Moment of the Muon journal September 2018
Precise Determination of the Branching Ratio of the Neutral-Pion Dalitz Decay journal January 2019
Determination of the Pole Position of the Lightest Hybrid Meson Candidate journal January 2019
New Physics Implications of Recent Search for K L → π 0 ν ν ¯ at KOTO journal February 2020
Measurement of the Permanent Electric Dipole Moment of the Neutron journal February 2020
Light Scalars and the Koto Anomaly journal May 2020
Search for Axionlike and Scalar Particles with the NA64 Experiment journal August 2020
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm journal April 2021
Evidence for the 2 π Decay of the K 2 0 Meson journal July 1964
Search for Decay Modes η → π + + π − + π 0 + γ AND η → π + + π − + γ + γ journal June 1967
Partial Decay Rates of the η 0 Meson journal December 1967
Measurement of the Charge Asymmetry in the Decay η → π + π − π 0 journal July 1972
Radiative Width of the η Meson journal May 1974
Decay Width of the Neutral π Meson journal December 1974
Decay Modes of the Meson η ′ ( 958 ) and Chiral-Symmetry Breaking journal November 1975
Symmetry Breaking through Bell-Jackiw Anomalies journal July 1976
A New Light Boson? journal January 1978
Problem of Strong P and T Invariance in the Presence of Instantons journal January 1978
Resolution of the η ′ → η π π Puzzle journal December 1978
Parametrization of the Kobayashi-Maskawa Matrix journal November 1983
Chiral Loops in π 0 , η 0 → γ γ and η − η ′ Mixing journal December 1985
Current-Mass Ratios of the Light Quarks journal May 1986
Search for Neutral Particles in Electron-Beam-Dump Experiment journal August 1986
Search for short-lived axions in an electron-beam-dump experiment journal August 1987
Pseudoscalar Decays into Two Photons in Chiral Perturbation Theory journal September 1988
Investigation of the electromagnetic structure of η and η’ mesons by two-photon interactions journal January 1990
Search for short-lived particles produced in an electron beam dump journal November 1991
Constraint on hypothetical light interacting bosons from low-energy neutron experiments journal March 1992
New limits on T -odd, P -even interactions journal June 1992
Evidence for a Three-Pion Resonance Near 550 Mev journal December 1961
Possible Light U(1) Gauge Boson Coupled to Baryon Number journal April 1995
Decay Modes and Width of the η Meson journal February 1962
Long-Distance Contributions to the K L → μ + μ − Decay Width journal May 1998
Electric Dipole Moments and the Mass Scale of New T -Violating, P -Conserving Interactions journal November 1999
Decay of Pseudoscalars into Lepton Pairs and Large- N c QCD journal December 1999
Search for Rare and Forbidden η ′ Decays journal January 2000
Observation of CP Violation in K L → π + π − e + e − Decays journal January 2000
Search for the CP Forbidden Decay η → 4 π 0 journal May 2000
Improved Limit on the Rate of the Decay K + → π + μ + e − journal September 2000
Search for Lepton Flavor Violation in K + Decays into a Charged Pion and Two Leptons journal October 2000
η ′ Mass and Chiral Symmetry Breaking at Large N c and N f journal June 2001
Noncommutative Field Theory and Lorentz Violation journal September 2001
MeV Dark Matter: Has It Been Detected? journal March 2004
Dark Matter Particle Production in b → s Transitions with Missing Energy journal November 2004
Test of Charge Conjugation Invariance journal February 2005
Dark Matter and the Baryon Asymmetry of the Universe journal January 2006
Improved Experimental Limit on the Electric Dipole Moment of the Neutron journal September 2006
The physics of heavy Z ′ gauge bosons journal August 2009
Neutral pion lifetime measurements and the QCD chiral anomaly journal January 2013
Electric dipole moments of atoms, molecules, nuclei, and particles journal January 2019
η ′ and η mesons with connection to anomalous glue journal February 2019
The Problem of mass journal November 1977
Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen journal January 2013
Measurement of the fine-structure constant as a test of the Standard Model journal April 2018
Precision measurement of the neutral pion lifetime journal April 2020
On mass corrections to the decay P → l + l − journal July 2008
Search for the ϕ → π+π−γγ and ϕ → π+π−η decays with the CMD-2 detector journal September 2008
Axial anomaly and vector meson dominance model journal August 2014
Decays τ → (η, η')K–ντ in the extended Nambu–Jona-Lasinio model journal May 2016
Update of the e + e − → π+π− cross section measured by the spherical neutral detector in the energy region 400 < √s < 1000 MeV journal September 2006
Searches for rare and forbidden neutral decays of η mesons at the GAMS-4π facility journal April 2007
Investigation of the decay η′ → 3 π 0 with the GAMS-4π spectrometer journal December 2008
Measurement of the matrix element for the decay η′ → ηπ 0 π 0 with the GAMS-4π spectrometer journal February 2009
Searches for the decays η′→ π 0 γγ and η′ → ηγγ at the GAMS-4π setup journal December 2015
Two-photon decays of $\pi^0$ , $\eta$ and $\eta'$ journal March 2004
Hadronic η and $ \eta{^\prime}$ decays journal December 2005
η, $ \eta{^\prime}$ → πl+l- in a chiral unitary approach journal July 2007
Cross-sections for low-energy πgamma; reactions journal May 2008
Determination of the Dalitz plot parameter $ \alpha$ for the decay $ \eta$ → 3 $ \pi^{0}_{}$ with the Crystal Ball at MAMI-B journal January 2009
Electromagnetic transitions in an effective chiral Lagrangian with the $ \eta^{{\prime}}_{}$ and light vector mesons journal December 2012
Reactions with pions and vector mesons in the sector of odd intrinsic parity journal September 2013
QED radiative corrections to the decay π0→e+e- journal April 2008
The K ℓ3 scalar form factors in the standard model journal August 2008
Electromagnetic corrections in η→3π decays journal February 2009
The cusp effect in η′→η π π decays journal June 2009
MO analysis of the high statistics Belle results on γ γ→π + π −, π 0 π 0 with chiral constraints journal October 2010
Roy–Steiner equations for γγ→ππ journal September 2011
Regge analysis of the ππ scattering amplitude journal February 2012
Dispersive analysis of ω→3π and ϕ→3π decays journal May 2012
Photon-fusion reactions from the chiral Lagrangian with dynamical light vector mesons journal April 2013
Dispersive analysis for η→γγ ⋆ journal December 2013
Analyticity of $$\eta \pi $$ η π isospin-violating form factors and the $$\tau \rightarrow \eta \pi \nu $$ τ → η π ν second-class decay journal July 2014
Rare decay $$\pi ^0\rightarrow e^+e^-$$ π 0 → e + e - : on corrections beyond the leading order journal August 2014
Dispersive analysis of the pion transition form factor journal November 2014
Constraints on the $$\mathbf {\omega \pi }$$ ω π form factor from analyticity and unitarity journal December 2014
A dispersive treatment of $$K_{\ell 4}$$ K ℓ 4 decays journal April 2015
Anomalous decay and scattering processes of the $$\eta $$ η meson journal June 2015
The $$\eta $$ η transition form factor from space- and time-like experimental data journal September 2015
Form factors of the isovector scalar current and the $$\eta \pi $$ η π scattering phase shifts journal October 2015
Two-hadron saturation for the pseudoscalar–vector–vector correlator and phenomenological applications journal December 2015
Convergence properties of $$\eta \rightarrow 3\pi $$ η → 3 π decays in chiral perturbation theory journal January 2017
The branching ratio $$\omega \rightarrow \pi ^+\pi ^-$$ ω → π + π - revisited journal February 2017
A study of the $$\gamma ^*$$ γ ∗ – $$f_{0}(980)$$ f 0 ( 980 ) transition form factors journal February 2017
Dispersion relations for $$\eta '\rightarrow \eta \pi \pi $$ η ′ → η π π journal July 2017
Extended chiral Khuri–Treiman formalism for $$\eta \rightarrow 3\pi $$ η → 3 π and the role of the $$a_0(980)$$ a 0 ( 980 ) , $$f_0(980)$$ f 0 ( 980 ) resonances journal August 2017
ALPs effective field theory and collider signatures journal August 2017
“Spin-dependent” $$\varvec{\mu \rightarrow e}$$ μ → e conversion on light nuclei journal February 2018
$$\eta ^{\prime }\rightarrow \eta \pi \pi $$ η ′ → η π π decays in unitarized resonance chiral theory journal September 2018
$$\pi \pi \rightarrow K {\bar{K}}$$ π π → K K ¯ scattering up to 1.47 GeV with hyperbolic dispersion relations journal November 2018
Dispersive analysis of $$\eta \rightarrow 3 \pi $$ η → 3 π journal November 2018
Solving integral equations in $$\eta \rightarrow 3\pi $$ η → 3 π journal November 2018
A new parametrization for the scalar pion form factors journal December 2018
FLAG Review 2019: Flavour Lattice Averaging Group (FLAG) journal February 2020
A theoretical analysis of the semileptonic decays $$\eta ^{(\prime )}\rightarrow \pi ^0l^+l^-$$ and $$\eta ^\prime \rightarrow \eta l^+l^-$$ journal December 2020
Study of the interactions of the axion with mesons and photons using a chiral effective Lagrangian model journal April 2020
The $$\pi \eta $$ interaction and $$a_0$$ resonances in photon–photon scattering journal May 2020
Dark-sector physics in the search for the rare decays $$K^+\rightarrow \pi ^+ \nu {\bar{\nu }}$$ and $$K_L\rightarrow \pi ^0 \nu {\bar{\nu }}$$ journal June 2020
Investigation of $K_\mathrm{L,S} \rightarrow \pi^+ \pi^{-} e^+ e^{-}$ decays journal September 2003
A new analysis of $\pi K$ scattering from Roy and Steiner type equations journal March 2004
CP VIOLATION IN THE DECAY η → π + π - γ journal July 2002
THE CP-VIOLATING ASYMMETRY IN η → π + π - e + e - journal August 2002
Some Tests on cpt Invariance journal March 2007
A search for decay η′ → 4 π 0 with GAMS-4π setup journal December 2014
Quark Structure of Pseudoscalar Mesons journal January 2000
Review of Asymmetric dark Matter journal July 2013
Mirror dark matter: Cosmology, galaxy structure and direct detection journal April 2014
LIMITS ON THE MASS OF LIGHT (PSEUDO)SCALAR PARTICLES FROM BETHE-HEITLER e + e− and μ + μ − PAIR PRODUCTION IN A PROTON-IRON BEAM DUMP EXPERIMENT journal June 1992
On a Composite Model for the New Particles journal December 1956
The Possible Existence of a Neutral Meson with Isotopic Spin 0 journal June 1958
A Possibile Symmetry in Sakata's Model for Bosons-Baryons System journal November 1959
C P -Violation in the Renormalizable Theory of Weak Interaction journal February 1973
Non-Abelian Anomaly and Vector Mesons as Dynamical Gauge Bosons of Hidden Local Symmetries journal April 1985
A Model of Strong Interactions journal January 1959
Mesonic Low-Energy Constants journal October 2014
The Low-Energy Frontier of Particle Physics journal November 2010
Flavor Physics Constraints for Physics Beyond the Standard Model journal November 2010
T ESTS OF THE G RAVITATIONAL I NVERSE -S QUARE L AW journal December 2003
Chiral Perturbation Theory journal November 2007
On Searches for CP, T, CPT and C Violation in Flavour-Changing and Flavour-Conserving Interactions journal January 2002
Eta Decays at and Beyond p4 in Chiral Perturbation Theory journal January 2002
Allowed Eta-Decay Modes and Chiral Symmetry journal January 2002
Decays of ? and ?' Mesons Caused by the Weak Interaction journal January 2002
The Neutral Decay Modes of the Eta-Meson journal January 2002
Applying New Physics to the Problems of the η' → π^0γγ Decay journal March 2020
Constraints on CP-Odd ALP Couplings from EDM Limits of Fermions journal December 2020

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Eta and eta-prime mesons
chiral symmetries
dispersion relations
fundamental symmetry tests
light hidden particles