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
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...
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
  • Funder: National Science Foundation (NSF)
  • Project Code: 1506416
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA
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