Phenomenology of TeV-scale scalar leptoquarks in the EFT

Bar-Shalom, Shaouly; Cohen, Jonathan; Soni, Amarjit; Wudka, Jose

doi:10.1103/PhysRevD.100.055020

Title: Phenomenology of TeV-scale scalar leptoquarks in the EFT

Abstract

We examine new aspects of leptoquark (LQ) phenomenology using effective field theory (EFT). We construct a complete set of leading effective operators involving SU(2) singlets scalar LQ and the Standard Model fields up to dimension six. We show that, while the renormalizable LQ-lepton-quark interaction Lagrangian can address the persistent hints for physics beyond the Standard Model in the B-decays $$\bar{B}$$ → $$D^{(*)}$$$$_{τ{\bar{v}}}$$ → $$\bar{B}$$ → $$\bar{K}$$ $$\ell^{+}\ell^{-}$$ and in the measured anomalous magnetic moment of the muon, the LQ higher dimensional effective operators may lead to new interesting effects associated with lepton number violation. These include the generation of one-loop and two-loops sub-eV Majorana neutrino masses, mediation of neutrinoless $$\textbf{double-}β$$ decay and novel LQ collider signals. For the latter, we focus on third generation LQ ($$Φ_3$$) in a framework with an approximate $$Z_3$$ generation symmetry and show that one class of the dimension five LQ operators may give rise to a striking asymmetric same-charge $$Φ_3Φ_3$$ pair-production signal, which leads to low background same-sign leptons signals at the LHC. For example, with $$M_{Φ_3} ~ 1 TeV$$ and a new physics scale of $Λ ~ 5 TeV$, we expect at the 13 TeV LHC with an integrated luminosity of 300 fb^-1, about 5000 positively charged $τ^+τ^+$ events via $$pp → Φ_3Φ_3 → τ^+ τ^+ + 2 · j_b$$ ($$j_b = b-jet$$), about 500 negatively charged $τ^-τ^-$ events with a signature $$pp → Φ_3Φ_3 → τ^-τ^- + 4 · j + 2 · j_b$$ ($$j$$ = light jet) and about 50 positively charged $ℓ^+ ℓ^+$ events via $$pp → ℓ^+ ℓ^+ + 2 · j_ b +$$ $$\not{E}_T$$ for any of the three charged leptons, $ℓ^+ ℓ^+ = e^+ e^+, μ^+ μ^+, τ^+ τ^+$. It is interesting to note that, in the LQ EFT framework, the expected same-sign lepton signals have a rate which is several times larger than the QCD LQ-mediated opposite-sign leptons signals, $$gg, {\bar{qq}} → Φ_3Φ^*_3$$ → $ℓ^+ℓ^- + X$. We also consider the same-sign charged lepton signals in the LQ EFT framework at higher energy hadron colliders such as a 27 TeV HE-LHC and a 100 TeV FCC-hh.

Authors:: Bar-Shalom, Shaouly; Cohen, Jonathan; Soni, Amarjit; Wudka, Jose

Publication Date:: Mon Sep 16 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1562168

Alternate Identifier(s):: OSTI ID: 1569539

Report Number(s):: BNL-212189-2019-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 055020

Grant/Contract Number:: SC0012704

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 5; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; phenomenology; TeV; leptoquark; EFT; scalar; lepton

Citation Formats


                    Bar-Shalom, Shaouly, Cohen, Jonathan, Soni, Amarjit, and Wudka, Jose. Phenomenology of TeV-scale scalar leptoquarks in the EFT.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.100.055020.

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                    Bar-Shalom, Shaouly, Cohen, Jonathan, Soni, Amarjit, & Wudka, Jose. Phenomenology of TeV-scale scalar leptoquarks in the EFT.  United States.  https://doi.org/10.1103/PhysRevD.100.055020

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                    Bar-Shalom, Shaouly, Cohen, Jonathan, Soni, Amarjit, and Wudka, Jose. Mon .  
"Phenomenology of TeV-scale scalar leptoquarks in the EFT".  United States.  https://doi.org/10.1103/PhysRevD.100.055020.

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@article{osti_1562168,

  title        = {Phenomenology of TeV-scale scalar leptoquarks in the EFT},

  author       = {Bar-Shalom, Shaouly and Cohen, Jonathan and Soni, Amarjit and Wudka, Jose},

  abstractNote = {We examine new aspects of leptoquark (LQ) phenomenology using effective field theory (EFT). We construct a complete set of leading effective operators involving SU(2) singlets scalar LQ and the Standard Model fields up to dimension six. We show that, while the renormalizable LQ-lepton-quark interaction Lagrangian can address the persistent hints for physics beyond the Standard Model in the B-decays $\bar{B}$ → $D^{(*)}$$_{τ{\bar{v}}}$ → $\bar{B}$ → $\bar{K}$ $\ell^{+}\ell^{-}$ and in the measured anomalous magnetic moment of the muon, the LQ higher dimensional effective operators may lead to new interesting effects associated with lepton number violation. These include the generation of one-loop and two-loops sub-eV Majorana neutrino masses, mediation of neutrinoless $\textbf{double-}β$ decay and novel LQ collider signals. For the latter, we focus on third generation LQ ($Φ_3$) in a framework with an approximate $Z_3$ generation symmetry and show that one class of the dimension five LQ operators may give rise to a striking asymmetric same-charge $Φ_3Φ_3$ pair-production signal, which leads to low background same-sign leptons signals at the LHC. For example, with $M_{Φ_3} ~ 1 TeV$ and a new physics scale of $Λ ~ 5 TeV$, we expect at the 13 TeV LHC with an integrated luminosity of 300 fb-1, about 5000 positively charged $τ^+τ^+$ events via $pp → Φ_3Φ_3 → τ^+ τ^+ + 2 · j_b$ ($j_b = b-jet$), about 500 negatively charged $τ^-τ^-$ events with a signature $pp → Φ_3Φ_3 → τ^-τ^- + 4 · j + 2 · j_b$ ($j$ = light jet) and about 50 positively charged $ℓ^+ ℓ^+$ events via $pp → ℓ^+ ℓ^+ + 2 · j_ b +$ $\not{E}_T$ for any of the three charged leptons, $ℓ^+ ℓ^+ = e^+ e^+, μ^+ μ^+, τ^+ τ^+$. It is interesting to note that, in the LQ EFT framework, the expected same-sign lepton signals have a rate which is several times larger than the QCD LQ-mediated opposite-sign leptons signals, $gg, {\bar{qq}} → Φ_3Φ^*_3$ → $ℓ^+ℓ^- + X$. We also consider the same-sign charged lepton signals in the LQ EFT framework at higher energy hadron colliders such as a 27 TeV HE-LHC and a 100 TeV FCC-hh.},

  doi          = {10.1103/PhysRevD.100.055020},

  journal      = {Physical Review D},

  number       = 5,

  volume       = 100,

  place        = {United States},

  year         = {Mon Sep 16 00:00:00 EDT 2019},

  month        = {Mon Sep 16 00:00:00 EDT 2019}

}

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FIG. 1: Tree-level graphs in the underlying heavy theory that generate the dimension five effective operatormore »

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DOI: 10.1103/PhysRevD.90.054014

Simultaneous explanation of R(D (∗)) and b→sμ + μ −: the last scalar leptoquarks standing
journal, September 2017

Crivellin, Andreas; Müller, Dario; Ota, Toshihiko
Journal of High Energy Physics, Vol. 2017, Issue 9
DOI: 10.1007/JHEP09(2017)040

Pair Production of Scalar Leptoquarks at the Fermilab Tevatron
journal, July 1997

Krämer, M.; Plehn, T.; Spira, M.
Physical Review Letters, Vol. 79, Issue 3
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Minimal Leptoquark Explanation for the $R_{D^{(*)}}$ , $R_{K}$ , and $(g - 2)_{μ}$ Anomalies
journal, April 2016

Bauer, Martin; Neubert, Matthias
Physical Review Letters, Vol. 116, Issue 14
DOI: 10.1103/PhysRevLett.116.141802

Measurement of the Ratio of the $B^{0} \to D^{* -} τ^{+} ν_{τ}$ and $B^{0} \to D^{* -} μ^{+} ν_{μ}$ Branching Fractions Using Three-Prong $τ$ -Lepton Decays
journal, April 2018

Aaij, R.; Adeva, B.; Adinolfi, M.
Physical Review Letters, Vol. 120, Issue 17
DOI: 10.1103/PhysRevLett.120.171802

B-decay anomalies in a composite leptoquark model
journal, December 2016

Barbieri, Riccardo; Murphy, Christopher W.; Senia, Fabrizio
The European Physical Journal C, Vol. 77, Issue 1
DOI: 10.1140/epjc/s10052-016-4578-7

Flavor models for $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, September 2015

Freytsis, Marat; Ligeti, Zoltan; Ruderman, Joshua T.
Physical Review D, Vol. 92, Issue 5
DOI: 10.1103/PhysRevD.92.054018

Flavor at ssc energies: A new mechanism for dynamically generated fermion masses
journal, November 1991

Kaplan, David B.
Nuclear Physics B, Vol. 365, Issue 2
DOI: 10.1016/S0550-3213(05)80021-5

Physics of leptoquarks in precision experiments and at particle colliders
journal, June 2016

Doršner, I.; Fajfer, S.; Greljo, A.
Physics Reports, Vol. 641
DOI: 10.1016/j.physrep.2016.06.001

One leptoquark to unify them? Neutrino masses and unification in the light of ( g − 2) μ , $R_{D^{(⋆)}}$ and R K anomalies
journal, October 2017

Popov, Oleg; White, G. A.
Nuclear Physics B, Vol. 923
DOI: 10.1016/j.nuclphysb.2017.08.007

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Title: Phenomenology of TeV-scale scalar leptoquarks in the EFT

Abstract

Citation Formats

Figures / Tables:

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays journal, August 2017

Testable radiative neutrino mass model without additional symmetries and explanation for the b → s ℓ + ℓ − anomaly journal, December 2016

Revisiting scalar leptoquark at the LHC journal, June 2018

Test of lepton flavor universality by the measurement of the B 0 → D * − τ + ν τ branching fraction using three-prong τ decays journal, April 2018

Unification without supersymmetry: Neutrino mass, proton decay and light leptoquarks journal, September 2005

R D ( * ) anomaly: A possible hint for natural supersymmetry with R -parity violation journal, November 2017

Technicoloured signatures journal, May 1980

Search for third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal, July 2017

Measurement of the branching ratio of B ¯ → D ( * ) τ − ν ¯ τ relative to B ¯ → D ( * ) ℓ − ν ¯ ℓ decays with hadronic tagging at Belle journal, October 2015

Double beta decay and neutrino mass models journal, May 2015

Final report of the E821 muon anomalous magnetic moment measurement at BNL journal, April 2006

Signatures for technicolor journal, September 1986

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations journal, July 2014

A composite pNGB leptoquark at the LHC journal, December 2018

Baryon number and lepton universality violation in leptoquark and diquark models journal, February 2018

Parton distributions for the LHC run II journal, April 2015

Test of Lepton Universality Using B + → K + ℓ + ℓ − Decays journal, October 2014

Search for a singly produced third-generation scalar leptoquark decaying to a τ lepton and a bottom quark in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal, July 2018

Evidence for an Excess of B ¯ → D ( * ) τ − ν ¯ τ Decays journal, September 2012

R D ( * ) motivated S 1 leptoquark scenarios: Impact of interference on the exclusion limits from LHC data journal, March 2019

Composite leptoquarks journal, February 1986

Review of Particle Physics journal, August 2018

Improved Limit on Neutrinoless Double- β Decay of Ge 76 from GERDA Phase II journal, March 2018

Neutrino masses and mixing angles from leptoquark interactions journal, September 2000

Are the weak interactions strong? journal, April 1981

Common origin of R K and neutrino masses journal, December 2015

Universally enhanced light-quarks Yukawa couplings paradigm journal, September 2018

Scalar leptoquarks from grand unified theories to accommodate the B -physics anomalies journal, September 2018

Cornering scalar leptoquarks at LHC journal, October 2014

Parton distributions from high-precision collider data: NNPDF Collaboration journal, October 2017

Confronting lepton flavor universality violation in B decays with high- p T tau lepton searches at LHC journal, January 2017

Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark journal, January 2019

Leptoquark pair production in hadronic interactions journal, September 1997

High- $$p_T$$ p T signatures in vector–leptoquark models journal, April 2019

Combined explanations of the b → s μ + μ − and b → c τ − ν ¯ anomalies: A general model analysis journal, January 2019

Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ 1 ℓ 2 modes journal, November 2016

Effective Lagrangian approach to neutrinoless double beta decay and neutrino masses journal, June 2012

Searching for third-generation composite leptoquarks at the LHC journal, January 2011

Composite leptoquarks at the LHC journal, February 2010

Baryon- and Lepton-Nonconserving Processes journal, November 1979

2, 84, 30, 993, 560, 15456, 11962, 261485, . . .: higher dimension operators in the SM EFT journal, August 2017

Light leptoquarks journal, March 1985

Search for third-generation scalar leptoquarks decaying to a top quark and a $$\tau $$ τ lepton at $$\sqrt{s}=13\,\text {Te}\text {V} $$ s = 13 Te journal, September 2018

Constraints on $$t$$ t -channel leptoquark exchange from LHC contact interaction searches journal, February 2015

FeynRules 2.0 — A complete toolbox for tree-level phenomenology journal, August 2014

Vacuum stability in an extended standard model with a leptoquark journal, February 2017

Mass without scalars journal, August 1979

Leptoquarks: Neutrino masses and related accelerator signals journal, March 2008

Closing the window on single leptoquark solutions to the B-physics anomalies journal, October 2018

Simplified models with baryon number violation but no proton decay journal, April 2013

MadAnalysis 5, a user-friendly framework for collider phenomenology journal, January 2013

Measurement of an excess of B ¯ → D ( * ) τ − ν ¯ τ decays and implications for charged Higgs bosons journal, October 2013

Measurement of the τ Lepton Polarization and R ( D * ) in the Decay B ¯ → D * τ − ν ¯ τ journal, May 2017

Heavy and light scalar leptoquarks in proton decay journal, July 2012

Counting Inclusive b Jets as an Efficient Probe of New Flavor Physics journal, April 2001

Toward a coherent solution of diphoton and flavor anomalies journal, August 2016

Maximal flavour violation: a Cabibbo mechanism for leptoquarks journal, November 2018

Pair production of scalar leptoquarks at the CERN LHC journal, March 2005

High- $$p_T$$ p T dilepton tails and flavor physics journal, August 2017

Measurement of the Ratio of Branching Fractions B ( B ¯ 0 → D * + τ − ν ¯ τ ) / B ( B ¯ 0 → D * + μ − ν ¯ μ ) journal, September 2015

Constraining the minimal flavor violating leptoquark explanation of the R D ( * ) anomaly journal, February 2019

Neutrino mass induced radiatively by supersymmetric leptoquarks journal, April 2000

Search for pair production of second-generation leptoquarks at s = 13 TeV journal, February 2019

Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle journal, January 2018

Scalar contributions to b→c(u)τν transitions journal, August 2017

Search for Leptoquarks Coupled to Third-Generation Quarks in Proton-Proton Collisions at s = 13 TeV journal, December 2018

Technicolour journal, August 1981

Pair production of scalar leptoquarks at the LHC to NLO parton shower accuracy journal, February 2016

Future colliders for particle physics—“Big and small” journal, November 2018

Lepton universality violation with lepton flavor conservation in B-meson decays journal, October 2015

Testing leptoquark models in B ¯ → D ( * ) τ ν ¯ journal, November 2013

Leptoquark toolbox for precision collider studies journal, May 2018

Search for heavy neutrinos or third-generation leptoquarks in final states with two hadronically decaying τ leptons and two jets in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal, March 2017

Unextended Hypercolor and Unification journal, November 1981

Walking technicolor signatures at hadron colliders journal, November 1991

The leptoquark Hunter’s guide: large coupling journal, January 2019

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays
journal, August 2017

Testable radiative neutrino mass model without additional symmetries and explanation for the $b \to s ℓ^{+} ℓ^{-}$ anomaly
journal, December 2016

Revisiting scalar leptoquark at the LHC
journal, June 2018

Test of lepton flavor universality by the measurement of the $B^{0} \to {D^{*}}^{-} τ^{+} ν_{τ}$ branching fraction using three-prong $τ$ decays
journal, April 2018

Unification without supersymmetry: Neutrino mass, proton decay and light leptoquarks
journal, September 2005

$R_{D^{(*)}}$ anomaly: A possible hint for natural supersymmetry with $R$ -parity violation
journal, November 2017

Technicoloured signatures
journal, May 1980

Search for third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, July 2017

Measurement of the branching ratio of $\bar{B} \to D^{()} τ^{-} {\bar{ν}}_{τ}$ relative to $\bar{B} \to D^{()} ℓ^{-} {\bar{ν}}_{ℓ}$ decays with hadronic tagging at Belle
journal, October 2015

Double beta decay and neutrino mass models
journal, May 2015

Final report of the E821 muon anomalous magnetic moment measurement at BNL
journal, April 2006

Signatures for technicolor
journal, September 1986

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

A composite pNGB leptoquark at the LHC
journal, December 2018

Baryon number and lepton universality violation in leptoquark and diquark models
journal, February 2018

Parton distributions for the LHC run II
journal, April 2015

Test of Lepton Universality Using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ Decays
journal, October 2014

Search for a singly produced third-generation scalar leptoquark decaying to a τ lepton and a bottom quark in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, July 2018

Evidence for an Excess of $\bar{B} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ Decays
journal, September 2012

$R_{D^{(*)}}$ motivated $S_{1}$ leptoquark scenarios: Impact of interference on the exclusion limits from LHC data
journal, March 2019

Composite leptoquarks
journal, February 1986

Review of Particle Physics
journal, August 2018

Improved Limit on Neutrinoless Double- $β$ Decay of ${}^{76}{Ge}$ from GERDA Phase II
journal, March 2018

Neutrino masses and mixing angles from leptoquark interactions
journal, September 2000

Are the weak interactions strong?
journal, April 1981

Common origin of $R_{K}$ and neutrino masses
journal, December 2015

Universally enhanced light-quarks Yukawa couplings paradigm
journal, September 2018

Scalar leptoquarks from grand unified theories to accommodate the $B$ -physics anomalies
journal, September 2018

Cornering scalar leptoquarks at LHC
journal, October 2014

Parton distributions from high-precision collider data: NNPDF Collaboration
journal, October 2017

Confronting lepton flavor universality violation in B decays with high- p T tau lepton searches at LHC
journal, January 2017

Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in $B$ Decays with a Vector Leptoquark
journal, January 2019

Leptoquark pair production in hadronic interactions
journal, September 1997

High- $$p_T$$ p T signatures in vector–leptoquark models
journal, April 2019

Combined explanations of the $b \to s μ^{+} μ^{-}$ and $b \to c τ^{-} \bar{ν}$ anomalies: A general model analysis
journal, January 2019

Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ 1 ℓ 2 modes
journal, November 2016

Effective Lagrangian approach to neutrinoless double beta decay and neutrino masses
journal, June 2012

Searching for third-generation composite leptoquarks at the LHC
journal, January 2011

Composite leptoquarks at the LHC
journal, February 2010

Baryon- and Lepton-Nonconserving Processes
journal, November 1979

2, 84, 30, 993, 560, 15456, 11962, 261485, . . .: higher dimension operators in the SM EFT
journal, August 2017

Light leptoquarks
journal, March 1985

Search for third-generation scalar leptoquarks decaying to a top quark and a $$\tau $$ τ lepton at $$\sqrt{s}=13\,\text {Te}\text {V} $$ s = 13 Te
journal, September 2018

Constraints on $$t$$ t -channel leptoquark exchange from LHC contact interaction searches
journal, February 2015

FeynRules 2.0 — A complete toolbox for tree-level phenomenology
journal, August 2014

Vacuum stability in an extended standard model with a leptoquark
journal, February 2017

Mass without scalars
journal, August 1979

Leptoquarks: Neutrino masses and related accelerator signals
journal, March 2008

Closing the window on single leptoquark solutions to the B-physics anomalies
journal, October 2018

Simplified models with baryon number violation but no proton decay
journal, April 2013

MadAnalysis 5, a user-friendly framework for collider phenomenology
journal, January 2013

Measurement of an excess of $\bar{B} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ decays and implications for charged Higgs bosons
journal, October 2013

Measurement of the $τ$ Lepton Polarization and $R (D^{})$ in the Decay $\bar{B} \to D^{} τ^{-} {\bar{ν}}_{τ}$
journal, May 2017

Heavy and light scalar leptoquarks in proton decay
journal, July 2012

Counting Inclusive $b$ Jets as an Efficient Probe of New Flavor Physics
journal, April 2001

Toward a coherent solution of diphoton and flavor anomalies
journal, August 2016

Maximal flavour violation: a Cabibbo mechanism for leptoquarks
journal, November 2018

Pair production of scalar leptoquarks at the CERN LHC
journal, March 2005

High- $$p_T$$ p T dilepton tails and flavor physics
journal, August 2017

Measurement of the Ratio of Branching Fractions $B ({\bar{B}}^{0} \to D^{* +} τ^{-} {\bar{ν}}_{τ}) / B ({\bar{B}}^{0} \to D^{* +} μ^{-} {\bar{ν}}_{μ})$
journal, September 2015

Constraining the minimal flavor violating leptoquark explanation of the ${R_{D}}_{(*)}$ anomaly
journal, February 2019

Neutrino mass induced radiatively by supersymmetric leptoquarks
journal, April 2000

Search for pair production of second-generation leptoquarks at $\sqrt{s} = 13 TeV$
journal, February 2019

Measurement of the $τ$ lepton polarization and $R (D^{})$ in the decay $\bar{B} \to D^{} τ^{-} {\bar{ν}}_{τ}$ with one-prong hadronic $τ$ decays at Belle
journal, January 2018

Scalar contributions to b→c(u)τν transitions
journal, August 2017

Search for Leptoquarks Coupled to Third-Generation Quarks in Proton-Proton Collisions at $\sqrt{s} = 13 TeV$
journal, December 2018

Technicolour
journal, August 1981

Pair production of scalar leptoquarks at the LHC to NLO parton shower accuracy
journal, February 2016

Future colliders for particle physics—“Big and small”
journal, November 2018

Lepton universality violation with lepton flavor conservation in B-meson decays
journal, October 2015

Testing leptoquark models in $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, November 2013

Leptoquark toolbox for precision collider studies
journal, May 2018

Search for heavy neutrinos or third-generation leptoquarks in final states with two hadronically decaying τ leptons and two jets in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, March 2017

Unextended Hypercolor and Unification
journal, November 1981

Walking technicolor signatures at hadron colliders
journal, November 1991

The leptoquark Hunter’s guide: large coupling
journal, January 2019

Leptoquark mechanism of neutrino masses within the grand unification framework
journal, June 2017

$R_{K}$ and future $b \to s ℓ ℓ$ physics beyond the standard model opportunities
journal, September 2014

Simultaneous explanation of R(D (∗)) and b→sμ + μ −: the last scalar leptoquarks standing
journal, September 2017

Pair Production of Scalar Leptoquarks at the Fermilab Tevatron
journal, July 1997