Single-spin asymmetry in DVCS: fragmentation region of polarised lepton

Details Single-spin asymmetry in DVCS: fragmentation region of polarised lepton Single-spin asymmetry in DVCS: fragmentation region of polarised lepton

2000-12-29

arxiv.org/abs/hep-ph/0012380v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pp, 1 fig, uses RevTeX package; some corrections, typos fixed

Scientific paper

For the kinematical region when a hard photon is emitted predominantly close to the direction of motion of a longitudinally polarized initial electron and relatively small momentum transfer to a proton we calculate the azimuthal asymmetry of photon emission. It arises from the interference of the Bethe-Heitler amplitude and those which are described by a heavy photon impact factor. Azimuthal asymmetry does not decrease in the limit of infinite cms energy. Lowest order expression for the impact factor of a heavy photon is presented.

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