Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries

F. X. Gilrod; Angela Biselli

doi:10.1103/PhysRevLett.100.162002

Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries

F. X. Gilrod, Angela Biselli

Fairfield University

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

Abstract

<p> The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e⃗ p→epγ) 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 (xB from 0.11 to 0.58, Q2 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~asinϕ/(1+ccosϕ). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.</p>

Original language	American English
Journal	Physical Review Letters
Volume	100
DOIs	https://doi.org/10.1103/PhysRevLett.100.162002
State	Published - Jan 1 2008

Disciplines

Physical Sciences and Mathematics
Physics

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@article{5a82853b789c4c5ba5d6cd50520c4dfb,

title = "Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries",

abstract = " The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e⃗ p\→ep\γ) 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 (xB from 0.11 to 0.58, Q2 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\textasciitilde{}asin\ϕ/(1+ccos\ϕ). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.",

author = "Gilrod, \{F. X.\} and Angela Biselli",

year = "2008",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.100.162002",

language = "American English",

volume = "100",

journal = "Physical Review Letters",

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T1 - Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries

AU - Gilrod, F. X.

AU - Biselli, Angela

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e⃗ p→epγ) 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 (xB from 0.11 to 0.58, Q2 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~asinϕ/(1+ccosϕ). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

AB - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e⃗ p→epγ) 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 (xB from 0.11 to 0.58, Q2 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~asinϕ/(1+ccosϕ). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/61

U2 - 10.1103/PhysRevLett.100.162002

DO - 10.1103/PhysRevLett.100.162002

M3 - Article

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries

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