Virtual Compton scattering measurements in the nucleon resonance region

Blomberg, A.; Atac, H.; Sparveris, Nikolaos; Paolone, M.; Achenbach, P.; Benali, M.; Beričič, J.; Böhm, R.; Correa, L.; Distler, M. O.; Esser, A.; Flay, D.; Fonvieille, H.; Friščić, I.; Kohl, Y.; Merkel, H.; Müller, U.; Meziani, Z. E.; Mihovilovic, M.; Pochodzalla, J.; Polychronopoulou, A.; Pasquini, B.; Schoth, M.; Schulz, F.; Schlimme, S.; Sfienti, C.; Sirca, S.; Weber, A.

doi:10.1140/epja/i2019-12877-0

Title: Virtual Compton scattering measurements in the nucleon resonance region

Journal Article · Tue Oct 22 00:00:00 EDT 2019 · European Physical Journal. A

DOI:https://doi.org/10.1140/epja/i2019-12877-0· OSTI ID:1596686

Blomberg, A. ^[1]; Atac, H. ^[1]; Sparveris, Nikolaos ^[1]; Paolone, M. ^[1]; Achenbach, P. ^[2]; Benali, M. ^[3]; Beričič, J. ^[4]; Böhm, R. ^[2]; Correa, L. ^[2]; Distler, M. O. ^[2]; Esser, A. ^[2]; Flay, D. ^[1]; Fonvieille, H. ^[3]; Friščić, I. ^[2]; Kohl, Y. ^[2]; Merkel, H. ^[2]; Müller, U. ^[2]; Meziani, Z. E. ^[1]; Mihovilovic, M. ^[4]; Pochodzalla, J. ^[2] more »

Temple Univ., Philadelphia, PA (United States)
Johannes Gutenberg Univ., Mainz (Germany)
Clermont Univ., Clermont-Ferrand (France)
Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
Univ. of Pavia (Italy)
Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); Univ. of Ljubljana (Slovenia)

We report on new measurements of the electric Generalized Polarizability (GP) of the proton $ \alpha_{E}$ in a kinematic region where a puzzling dependence on momentum transfer has been observed, and we have found that $ \alpha_E = (5.3 \pm 0.6_{stat} \pm 1.3_{sys}) 10^{-4}$ fm³ at $ Q^{2}=0.20$ (GeV/c)². The new measurements, when considered along with the rest of the world data, suggest that $ \alpha_E$ can be described by either a local plateau or by an enhancement in the region $ Q^2=0.20$ (GeV/c)² to 0.33 (GeV/c)². The experiment also provides the first measurement of the Coulomb quadrupole amplitude in the $ N \rightarrow \Delta$ transition through the exploration of the $ p(e,e'p)\gamma$ reaction. The new measurement gives $ CMR = (-4.4 \pm 0.8_{stat} \pm 0.6_{sys})\%$ at $ Q^2=0.20$ (GeV/c)² and is consistent with the results from the pion electroproduction world data. It has been obtained using a completely different extraction method, and therefore represents a strong validation test of the world data model uncertainties.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Temple Univ., Philadelphia, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); German Research Foundation (DFG)

Grant/Contract Number:: SC0016577

OSTI ID:: 1596686

Journal Information:: European Physical Journal. A, Vol. 55, Issue 10; Related Information: Adam Blomberg, PhD Thesis, Temple University, Dept. of Physics (2016); ISSN 1434-6001

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 5 works

Citation information provided by
Web of Science

References (48)

QED radiative corrections to virtual Compton scattering Vanderhaeghen, M.; Friedrich, J. M.; Lhuillier, D. Physical Review C, Vol. 62, Issue 2 https://doi.org/10.1103/PhysRevC.62.025501	journal	July 2000
The three-spectrometer facility at the Mainz microtron MAMI Blomqvist, K. I.; Boeglin, W. U.; Böhm, R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 403, Issue 2-3 https://doi.org/10.1016/S0168-9002(97)01133-9	journal	February 1998
Overview: The Shape of Hadrons Bernstein, A. M.; Papanicolas, C. N. SHAPES OF HADRONS, AIP Conference Proceedings https://doi.org/10.1063/1.2734399	conference	January 2007
$N$ -to- $Δ$ Electromagnetic-Transition Form Factors from Lattice QCD Alexandrou, C.; de Forcrand, Ph.; Neff, H. Physical Review Letters, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevLett.94.021601	journal	January 2005
Virtual Compton scattering off the nucleon Guichon, P. Progress in Particle and Nuclear Physics, Vol. 41 https://doi.org/10.1016/S0146-6410(98)00056-8	journal	January 1998
Measurements of the γ*p → Δ reaction at low Q2 Sparveris, N.; Stave, S.; Achenbach, P. The European Physical Journal A, Vol. 49, Issue 10 https://doi.org/10.1140/epja/i2013-13136-2	journal	October 2013
The role of the pion cloud in electroproduction of the Δ(1232) Fiolhais, M.; Golli, B.; Širca, S. Physics Letters B, Vol. 373, Issue 1-3 https://doi.org/10.1016/0370-2693(96)00130-X	journal	April 1996
Light-Front Interpretation of Proton Generalized Polarizabilities Gorchtein, M.; Lorcé, C.; Pasquini, B. Physical Review Letters, Vol. 104, Issue 11 https://doi.org/10.1103/PhysRevLett.104.112001	journal	March 2010
A new measurement of the structure functions PLL - PTT/ε and PLT in virtual Compton scattering at Q2 = 0.33 (GeV/c)2 Janssens, P.; Doria, L.; Achenbach, P. The European Physical Journal A, Vol. 37, Issue 1 https://doi.org/10.1140/epja/i2008-10609-3	journal	July 2008
Virtual Compton scattering measurements in the $γ^{*} N \to Δ$ transition Sparveris, N. F.; Achenbach, P.; Gayoso, C. Ayerbe Physical Review C, Vol. 78, Issue 1 https://doi.org/10.1103/PhysRevC.78.018201	journal	July 2008
Dispersion relations in real and virtual Compton scattering Drechsel, D.; Pasquini, B.; Vanderhaeghen, M. Physics Reports, Vol. 378, Issue 2-3 https://doi.org/10.1016/S0370-1573(02)00636-1	journal	May 2003
Pion Cloud and the $Q^{2}$ Dependence of $γ^{*} N \leftrightarrow Δ$ Transition Form Factors Kamalov, S. S.; Nan Yang, Shin Physical Review Letters, Vol. 83, Issue 22 https://doi.org/10.1103/PhysRevLett.83.4494	journal	November 1999
Generalized polarizabilities of the nucleon in chiral effective theories Hemmert, Thomas R.; Holstein, Barry R.; Knöchlein, Germar Physical Review D, Vol. 62, Issue 1 https://doi.org/10.1103/PhysRevD.62.014013	journal	May 2000
Structure analysis of the virtual Compton scattering amplitude at low energies Drechsel, D.; Knöchlein, G.; Korchin, A. Yu. Physical Review C, Vol. 57, Issue 2 https://doi.org/10.1103/PhysRevC.57.941	journal	February 1998
Dispersion theory of nucleon Compton scattering and polarizabilities Schumacher, M.; Scadron, M. D. Fortschritte der Physik, Vol. 61, Issue 7-8 https://doi.org/10.1002/prop.201300007	journal	April 2013
Virtual Compton scattering and the generalized polarizabilities of the proton at $Q^{2} = 0.92$ and 1.76 GeV $^{2}$ Fonvieille, H.; Laveissière, G.; Degrande, N. Physical Review C, Vol. 86, Issue 1 https://doi.org/10.1103/PhysRevC.86.015210	journal	July 2012
First Determination of Generalized Polarizabilities of the Proton by a Virtual Compton Scattering Experiment Roche, J.; Friedrich, J. M.; Lhuillier, D. Physical Review Letters, Vol. 85, Issue 4 https://doi.org/10.1103/PhysRevLett.85.708	journal	July 2000
Investigation of the Conjectured Nucleon Deformation at Low Momentum Transfer Sparveris, N. F.; Alarcon, R.; Bernstein, A. M. Physical Review Letters, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevLett.94.022003	journal	January 2005
Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction Aznauryan, I. G.; Burkert, V. D.; Biselli, A. S. Physical Review C, Vol. 80, Issue 5 https://doi.org/10.1103/PhysRevC.80.055203	journal	November 2009
Polarizability of the nucleon and Compton scattering Schumacher, M. Progress in Particle and Nuclear Physics, Vol. 55, Issue 2 https://doi.org/10.1016/j.ppnp.2005.01.033	journal	October 2005
Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at $Q^{2} = 0.92$ and $1.76 {G e V}^{2}$ Laveissière, G.; Todor, L.; Degrande, N. Physical Review Letters, Vol. 93, Issue 12 https://doi.org/10.1103/PhysRevLett.93.122001	journal	September 2004
Generalized polarizabilities of the nucleon in baryon chiral perturbation theory Lensky, Vadim; Pascalutsa, Vladimir; Vanderhaeghen, Marc The European Physical Journal C, Vol. 77, Issue 2 https://doi.org/10.1140/epjc/s10052-017-4652-9	journal	February 2017
Generalized polarizabilities of the proton in a constituent quark model revisited Pasquini, B.; Scherer, S.; Drechsel, D. Physical Review C, Vol. 63, Issue 2 https://doi.org/10.1103/PhysRevC.63.025205	journal	January 2001
Dispersion Theory in Electromagnetic Interactions Pasquini, Barbara; Vanderhaeghen, Marc Annual Review of Nuclear and Particle Science, Vol. 68, Issue 1 https://doi.org/10.1146/annurev-nucl-101917-020843	journal	October 2018
Measurements of the Generalized Electric and Magnetic Polarizabilities of the Proton at Low $Q^{2}$ Using the Virtual-Compton-Scattering Reaction Bourgeois, P.; Sato, Y.; Shaw, J. Physical Review Letters, Vol. 97, Issue 21 https://doi.org/10.1103/PhysRevLett.97.212001	journal	November 2006
Electroexcitation of the Δ + (1232) at low momentum transfer Blomberg, A.; Anez, D.; Sparveris, N. Physics Letters B, Vol. 760 https://doi.org/10.1016/j.physletb.2016.06.076	journal	September 2016
Lowest- Q2 measurement of the γp → Δ reaction: Probing the pionic contribution Stave, S.; Distler, M. O.; Nakagawa, I. The European Physical Journal A, Vol. 30, Issue 3 https://doi.org/10.1140/epja/i2006-10162-1	journal	December 2006
Low-energy and low-momentum representation of the virtual Compton scattering amplitude Drechsel, D.; Knöchlein, G.; Korchin, A. Yu. Physical Review C, Vol. 58, Issue 3 https://doi.org/10.1103/PhysRevC.58.1751	journal	September 1998
Low-energy Compton scattering and the polarizabilities of the proton Olmos de León, V.; Wissmann, F.; Achenbach, P. The European Physical Journal A, Vol. 10, Issue 2 https://doi.org/10.1007/s100500170132	journal	April 2001
π0 Photo- and electroproduction at threshold within a dynamical model Kamalov, S. S.; Chen, Guan-Yeu; Yang, Shin Nan Physics Letters B, Vol. 522, Issue 1-2 https://doi.org/10.1016/S0370-2693(01)01241-2	journal	December 2001
$\frac{E_{1 +}}{M_{1 +}}$ and $\frac{S_{1 +}}{M_{1 +}}$ and their $Q^{2}$ dependence in $γ_{v} N \to Δ$ with relativized quark-model wave functions Capstick, Simon; Karl, Gabriel Physical Review D, Vol. 41, Issue 9 https://doi.org/10.1103/PhysRevD.41.2767	journal	May 1990
Generalized polarizabilities of the nucleon studied in the linear sigma model Metz, A.; Drechsel, D. Zeitschrift für Physik A: Hadrons and Nuclei, Vol. 356, Issue 1 https://doi.org/10.1007/BF02769238	journal	December 1996
A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV Drechsel, D.; Hanstein, O.; Kamalov, S. S. Nuclear Physics A, Vol. 645, Issue 1 https://doi.org/10.1016/S0375-9474(98)00572-7	journal	January 1999
Measurement of the Recoil Polarization in the $p (\vec{e}, e^{'} \vec{p}) π^{0}$ Reaction at the $Δ (1232)$ Resonance Pospischil, Th.; Bartsch, P.; Baumann, D. Physical Review Letters, Vol. 86, Issue 14 https://doi.org/10.1103/PhysRevLett.86.2959	journal	April 2001
Measurement of the LT-asymmetry in πelectroproduction at the energy of the Δ(1232)-resonance Elsner, D.; Süle, A.; Barneo, P. The European Physical Journal A, Vol. 27, Issue 1 https://doi.org/10.1140/epja/i2005-10212-2	journal	January 2006
Electromagnetic form factors in the Hypercentral Constituent Quark Model De Sanctis, M.; Giannini, M. M.; Santopinto, E. Nuclear Physics A, Vol. 755 https://doi.org/10.1016/j.nuclphysa.2005.03.143	journal	June 2005
Analysis of pion photoproduction data Arndt, R. A.; Briscoe, W. J.; Strakovsky, I. I. Physical Review C, Vol. 66, Issue 5 https://doi.org/10.1103/PhysRevC.66.055213	journal	November 2002
Virtual compton scattering and generalized polarizabilities of the proton Guichon, P. A. M.; Liu, G. Q.; Thomas, A. W. Nuclear Physics A, Vol. 591, Issue 4 https://doi.org/10.1016/0375-9474(95)00217-O	journal	September 1995
Nucleon polarizabilities: From Compton scattering to hydrogen atom Hagelstein, Franziska; Miskimen, Rory; Pascalutsa, Vladimir Progress in Particle and Nuclear Physics, Vol. 88 https://doi.org/10.1016/j.ppnp.2015.12.001	journal	May 2016
Chiral effective-field theory in the $Δ (1232)$ region: Pion electroproduction on the nucleon Pascalutsa, Vladimir; Vanderhaeghen, Marc Physical Review D, Vol. 73, Issue 3 https://doi.org/10.1103/PhysRevD.73.034003	journal	February 2006
Signatures of chiral dynamics in the nucleon to Delta transition⋆ Gail, T. A.; Hemmert, T. R. The European Physical Journal A, Vol. 28, Issue 1 https://doi.org/10.1140/epja/i2006-10023-y	journal	April 2006
Dispersion relation formalism for virtual Compton scattering off the proton Pasquini, B.; Gorchtein, M.; Drechsel, D. The European Physical Journal A, Vol. 11, Issue 2 https://doi.org/10.1007/s100500170084	journal	July 2001
Nucleon polarizabilities in virtual Compton scattering Korchin, A. Yu.; Scholten, O. Physical Review C, Vol. 58, Issue 2 https://doi.org/10.1103/PhysRevC.58.1098	journal	August 1998
Nucleon and $${\Delta}$$ Δ Elastic and Transition Form Factors Segovia, Jorge; Cloët, Ian C.; Roberts, Craig D. Few-Body Systems, Vol. 55, Issue 12 https://doi.org/10.1007/s00601-014-0907-2	journal	October 2014
Large- $N_{c}$ relations for the electromagnetic nucleon-to- $Δ$ form factors Pascalutsa, Vladimir; Vanderhaeghen, Marc Physical Review D, Vol. 76, Issue 11 https://doi.org/10.1103/PhysRevD.76.111501	journal	December 2007
Determination of quadrupole strengths in the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>γ</mml:mi><mml:mo>∗</mml:mo></mml:msup><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi mathvariant="normal">Δ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1232</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> transition at <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>=</mml:mo><mml:mn>0.20</mml:mn><mml:mspace width="0.25em"/><mml:msup><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mtext>GeV</mml:mtext><mml:mo stretchy="false">/</mml:mo><mml:mi>c</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msup></mml:math> Sparveris, N. F.; Achenbach, P.; Gayoso, C. Ayerbe Physics Letters B, Vol. 651, Issue 2-3 https://doi.org/10.1016/j.physletb.2007.04.056	journal	July 2007
Virtual Compton scattering at low energy and the generalized polarizabilities of the nucleon Fonvieille, H. Progress in Particle and Nuclear Physics, Vol. 55, Issue 1 https://doi.org/10.1016/j.ppnp.2005.01.013	journal	July 2005
Dynamical study of the $Δ$ excitation in ${N (e, e}^{'} π)$ reactions Sato, T.; Lee, T. -S. H. Physical Review C, Vol. 63, Issue 5 https://doi.org/10.1103/PhysRevC.63.055201	journal	March 2001

Cited By (1)

New Insight in the Q2 Dependence of Proton Generalized Polarizabilities Unknown, (:Unkn) My University https://doi.org/10.34944/dspace/4508	text	January 2019

Similar Records

Production of $\omega $ mesons in pp collisions at $\mathbf {\sqrt{s}=7\,\text {TeV}}$

Journal Article · Mon Dec 07 00:00:00 EST 2020 · European Physical Journal. C, Particles and Fields · OSTI ID:1596686

Acharya, S.; Adamová, D.; Adler, A.; +1024 more

Evidence of a structure in $\bar{K}^{0} \Lambda _{c}^{+}$ consistent with a charged $\Xi _c(2930)^{+}$, and updated measurement of $\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$ at Belle

Journal Article · Tue Nov 13 00:00:00 EST 2018 · European Physical Journal. C, Particles and Fields · OSTI ID:1596686

Li, Y. B.; Shen, C. P.; Adachi, I.; +174 more

Low momentum transfer measurements of pion electroproduction and virtual Compton scattering at the Delta resonance

Thesis/Dissertation · Thu Dec 01 00:00:00 EST 2016 · OSTI ID:1596686

Blomberg, Adam

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
proton
polarizabilities

Title: Virtual Compton scattering measurements in the nucleon resonance region

Citation Formats

References (48)

Cited By (1)

Similar Records

Related Subjects