Observation of exclusive deeply virtual compton scattering in polarized electron beam asymmetry measurements

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3 Scopus citations

Abstract

We report the first results of the beam-spin asymmetry measured in the reaction ep → epγ at a beam energy of 4.25 GeV. A large asymmetry with a sinφ modulation is observed, as predicted for the interference term of deeply virtual compton scattering (DVCS) and the Bethe-Heitler process. The amplitude of this modulation is α=0.202±0.028. In leading-order and leading-twist perturbative QCD, the α is directly proportional to the imaginary part of the DVCS amplitude.

Original languageEnglish
Pages (from-to)182002
Number of pages1
JournalPhysical Review Letters
Volume87
Issue number18
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • General Physics and Astronomy

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