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Deeply virtual Compton scattering and generalized parton distributions at CLAS

Abstract : The exclusive electroproduction of real photons and mesons at high momentum transfer allows us to access the Generalized Parton Distributions (GPDs). The formalism of the GPDs provides a unified description of the hadronic structure in terms of quark and gluonic degrees of freedom. In particular, the Deeply Virtual Compton Scattering (DVCS), ep -> e'p'gamma, is one of the key reactions to determine the GPDs experimentally, as it is the simplest process that can be described in terms of GPDs. A dedicated experiment to study DVCS has been carried out in Hall B at Jefferson Lab. Beam-spin asymmetries, resulting from the interference of the Bethe-Heitler process and DVCS have been extracted over the widest kinematic range ever accessed for this reaction (1.2 < Q(2) < 3.7 (GeV/c)(2), 0.09 <-t < 1.3 (GeV/c)(2), 0.13 < x(B) < 0.46). In this paper, the results obtained experimentally are shown and compared to GPD parametrizations.
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Contributor : Sophie Heurteau <>
Submitted on : Wednesday, January 28, 2009 - 11:12:46 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:13 PM

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S. Niccolai. Deeply virtual Compton scattering and generalized parton distributions at CLAS. European Physical Journal A, EDP Sciences, 2008, 38, pp.141-144. ⟨10.1140/epja/i2008-10653-y⟩. ⟨in2p3-00355278⟩



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