Document Type

Article

Publication Date

12-29-2006

Abstract

We present the first measurements of the e⃗p→epγ cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q2 dependence (from 1.5 to 2.3  GeV2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q2. The helicity-independent cross section is also measured at Q2=2.3  GeV2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.

DOI

10.1103/PhysRevLett.97.262002

Version

Publisher's PDF

Comments

© 2006 The American Physical Society. The original publication is available at http://link.aps.org/doi/10.1103/PhysRevLett.97.262002

Original Citation

Phys. Rev. Lett. 97, 262002 (2006)

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