Extraction of the generalized parton distribution from DVCS
نویسندگان
چکیده
منابع مشابه
DVCS amplitude in the parton model
We compute amplitude of deeply virtual Compton scattering in the parton model. We found that the amplitude up to the accuracy O(1/Q) depends on new skewed par-ton distributions (SPD's). These additional contributions make the DVCS amplitude explicitly transverse.
متن کاملDual parameterization of generalized parton distributions and description of DVCS data
M.V. Polyakov Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany and Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188350, Russia Abstract We discuss a new leading-order parameterization of generalized parton distributions of the proton, which is based on the idea of duality. In its minimal version, the parameterization is defined by the usual...
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The basic properties of generalized parton distributions (GPDs) and some recent applications of GPDs are discussed. Talk given at the Workshop “Continuous Advances in QCD 2004”, Minneapolis, May 13-16, 2004 Also at Laboratory of Theoretical Physics,JINR, Dubna, Russia
متن کاملExtraction of Parton Distributions from Lattice Qcd
We review the calculation of moments of both the polarized and unpolarized parton distribution functions of the nucleon in lattice QCD, and in particular their extrapolation to the physical region. We also discuss the reconstruction of the x dependence of the valence quark distributions in the nucleon from a finite number of lattice moments.
متن کاملExtraction of skewed parton distributions from experiment
The basic concept of SPD’s [ 1, 2, 3, 4, 5] is best illustrated with the lowest order graph of deeply virtual Compton scattering (DVCS) in which a quark of momentum fraction x1 leaves the proton and is returned to it with x2. The two fractions not being equal is due to the fact that an on-shell photon is produced which necessitates a change in the + momentum in going from the virtual space-like...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2002
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(02)01211-3