Measurement of Unpolarized and Polarized Cross Sections for Deeply Virtual Compton Scattering on the Proton at Jefferson Laboratory with CLAS

Abstract

This paper reports the measurement of polarized and unpolarized cross sections for the ep -> e'p' reaction, which is comprised of Deeply Virtual Compton Scattering (DVCS) and Bethe-Heitler (BH) processes, at an electron beam energy of 5.88 GeV at the Thomas Jefferson National Accelerator Facility using the Large Acceptance Spectrometer CLAS. The unpolarized cross sections and polarized cross section differences have been measured over broad kinematics, 0.10 < x_B < 0.58, 1.0 < Q^2 < 4.8 GeV^2, and 0.09 < -t < 2.00 GeV^2. The results are found to be consistent with previous CLAS data, and these new data are discussed in the framework of the generalized parton distribution approach. Calculations with two widely used phenomenological models, denoted VGG and KMSC, are approximately compatible with the experimental results over a large portion of the kinematic range of the data.

arXiv comment27 pages, 24 figures, Accepted for publication in PRC

References in corpus (33)

• Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
• Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
• Generalized Parton Distributions
• Deeply Virtual Compton Scattering
• Unraveling hadron structure with generalized parton distributions
• Hard Exclusive Reactions and the Structure of Hadrons
• Impact Parameter Dependent Parton Distributions and Off-Forward Parton Distributions for $\zeta \to 0$
• Off-Forward Parton Distributions
• Theory of deeply virtual Compton scattering on the nucleon
• Generalized parton distributions and strong forces inside nucleons and nuclei
• Deeply virtual electroproduction of photons and mesons on the nucleon : leading order amplitudes and power corrections
• Nucleon Form Factors from Generalized Parton Distributions
• Observation of exclusive DVCS in polarized electron beam asymmetry measurements
• Generalized Parton Distributions in the valence region from Deeply Virtual Compton Scattering
• Deeply Virtual Compton Scattering Beam-Spin Asymmetries
• Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
• Measurement of Deeply Virtual Compton Scattering at HERA
• Measurement of Deeply Virtual Compton Scattering and its t-dependence at HERA
• QED radiative corrections to virtual Compton scattering
• Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs
• Measurement of Deeply Virtual Compton Scattering with a Polarized Proton Target
• New empirical fits to the proton electromagnetic form factors
• Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions
• From hard exclusive meson electroproduction to deeply virtual Compton scattering
• The E00-110 experiment in Jefferson Lab's Hall A: Deeply Virtual Compton Scattering off the Proton at 6 GeV
• Leading twist asymmetries in deeply virtual Compton scattering
• Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target
• Measurement of Exclusive ${\pi }^0$ Electroproduction Structure Functions and their Relationship to Transversity GPDs
• Longitudinal target-spin asymmetries for deeply virtual Compton scattering
• Exclusive ${\pi }^0$ electroproduction at $W>2$ GeV with CLAS
• Exclusive $\eta$ electroproduction at $W>2$ GeV with CLAS and transversity generalized parton distributions
• PARTONS: PARtonic Tomography Of Nucleon Software. A computing framework for the phenomenology of Generalized Parton Distributions
• Radiative effects in the processes of exclusive photon electroproduction from polarized protons

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• Deciphering Twist-3 Chiral-Even GPDs in the Light-Front Quark-Diquark Model
• Deeply virtual Compton scattering in the tensor-pomeron approach
• Deeply virtual Compton scattering off the neutron