Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements

S. Stepanyan; Angela Biselli

doi:10.1103/PhysRevLett.87.182002

Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements

S. Stepanyan, Angela Biselli

Fairfield University

Research output: Contribution to journal › Article › peer-review

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 language	American English
Journal	Physical Review Letters
Volume	87
DOIs	https://doi.org/10.1103/PhysRevLett.87.182002
State	Published - Jan 1 2001

Disciplines

Physical Sciences and Mathematics
Physics

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Observation of Exclusive Deeply Virtual Compton Scattering in PolFinal published version, 149 KBLicense: CC BY

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title = "Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements",

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.",

author = "S. Stepanyan and Angela Biselli",

year = "2001",

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doi = "10.1103/PhysRevLett.87.182002",

language = "American English",

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T1 - Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements

AU - Stepanyan, S.

AU - Biselli, Angela

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N2 - 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.

AB - 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.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/104

U2 - 10.1103/PhysRevLett.87.182002

DO - 10.1103/PhysRevLett.87.182002

M3 - Article

VL - 87

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements

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