publication . Article . Preprint . Other literature type . 2018

Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering

A.A. Lednev; Laura Silva; A. Kerbizi; V.A. Polyakov; S. Sarkar; J. Bernhard; C. Chatterjee; Markus Ball; H. Suzuki; A.S. Nunes; ...
Open Access
  • Published: 21 Feb 2018
Abstract
We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $\mu^+$ and $\mu^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $\mu^+$ and $\mu^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the final final proton. The slope $B$ of the $t$-dependence is fitted with a single exponential function, which yields $B=(4.3 \ \pm \ 0.6_{\text{stat}}\_{- \ 0.3}^{+ \ 0.1}\big\rvert_{\text{sys}}) (\text{GeV}/c)^{-2}$. This result can be converted into an average t...
Subjects
free text keywords: slope, momentum transfer dependence, exclusive reaction, generalized parton distribution, quantum chromodynamics, transverse, cross section: measured, muon: beam, deeply virtual Compton scattering, hydrogen: liquid: target, p: size, experimental results, COMPASS, Generalized Parton Distributions, Proton size, Deep inelastic scattering, Exclusive reactions, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 160 GeV/c, muon p --> muon p photon, slope: (calculated), CERN SPS, size: (transverse), Monte Carlo, photon: production, muon: polarization, beam: polarization, photon: mediation, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], High Energy Physics - Experiment, Nuclear Experiment, Physics, QC1-999, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 530, Nuclear and High Energy Physics, Particle Physics - Experiment, nucl-ex, Nuclear Physics - Experiment, hep-ex, measured [cross section], liquid: target [hydrogen], beam [muon], size [p], COMPASS; Deep inelastic scattering; Deeply virtual Compton scattering; Exclusive reactions; Generalized Parton Distributions; Proton size; Quantum chromodynamics, Subatomic Physics, Subatomär fysik, Quark, Compton scattering, Parton, Transverse plane, Proton, Photon, Nuclear physics, ddc:530
Funded by
NSF| A Program of Medium Energy Nuclear Physics
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1506416
,
EC| HADRONPHYSICS3
Project
HADRONPHYSICS3
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA
38 references, page 1 of 3

[1] D. Müller, D. Robaschik, B. Geyer, F.-M. Dittes, J. Horˇejši, Fortschr. Phys. 42 (1994) 101.

[2] X.-D. Ji, Phys. Rev. Lett. 78 (1997) 610.

[3] X.-D. Ji, Phys. Rev. D 55 (1997) 7114.

[4] A.V. Radyushkin, Phys. Lett. B 380 (1996) 417.

[5] A.V. Radyushkin, Phys. Rev. D 56 (1997) 5524.

[6] M. Burkardt, Phys. Rev. D 62 (2000) 071503, Phys. Rev. D 66 (2002), 119903(i).

[7] M. Burkardt, Int. J. Mod. Phys. A 18 (2003) 173.

[8] M. Diehl, Eur. Phys. J. C 25 (2002) 223, Eur. Phys. J. C 31 (2003), 277(i).

[9] J.P. Ralston, B. Pire, Phys. Rev. D 66 (2002) 111501.

[10] N. d'Hose, S. Niccolai, A. Rostomyan, Eur. Phys. J. A 52 (2016) 151.

[11] L. Frankfurt, M. Strikman, C. Weiss, Annu. Rev. Nucl. Part. Sci. 55 (2005) 403.

[12] E.-C. Aschenauer, S. Fazio, K. Kumericki, D. Mueller, J. High Energy Phys. 09 (2013) 93.

[13] H. Moutarde, P. Sznajder, J. Wagner, Eur. Phys. J. C 78 (2018) 890.

[14] A.V. Belitsky, D. Müller, A. Kirchner, Nucl. Phys. B 629 (2002) 323.

[15] L.N. Hand, Phys. Rev. 129 (1963) 1834.

38 references, page 1 of 3
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