Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.162002
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Funding
- Science and Technology Facilities Council [ST/F500572/1] Funding Source: researchfish
- STFC [ST/F500572/1] Funding Source: UKRI
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The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.
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