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Polarization Transfer in Proton Compton Scattering at High Momentum Transfer

D. J. Hamilton·V. H. Mamyan·the Jefferson Lab Hall A Collaboration
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Abstract

Compton scattering from the proton was investigated at s=6.9 (GeV/c)**2 and \t=-4.0 (GeV/c)**2 via polarization transfer from circularly polarized incident photons. The longitudinal and transverse components of the recoil proton polarization were measured. The results are in excellent agreement with a prediction based on a reaction mechanism in which the photon interacts with a single quark carrying the spin of the proton and in disagreement with a prediction of pQCD based on a two-gluon exchange mechanism.

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D. J. Hamilton, V. H. Mamyan, the Jefferson Lab Hall A Collaboration. 2004-10-01. Polarization Transfer in Proton Compton Scattering at High Momentum Transfer. https://doi.org/10.1103/physrevlett.94.242001

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