Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions

Hyon-Suk Jo; Angela Biselli

doi:10.1103/PhysRevLett.115.212003

Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions

Hyon-Suk Jo, Angela Biselli

Fairfield University

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

Abstract

<p> Unpolarized and beam-polarized fourfold cross sections (d4σ/dQ2dxBdtdϕ) for the ep→e′p′γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 (Q2,xB,t) bins over the widest phase space ever explored in the valence-quark region. Several models of generalized parton distributions (GPDs) describe the data well at most of our kinematics. This increases our confidence that we understand the GPD H, expected to be the dominant contributor to these observables. Through a leading-twist extraction of Compton form factors, these results support the model predictions of a larger nucleon size at lower quark-momentum fraction xB.</p>

Original language	American English
Journal	Physical Review Letters
Volume	115
DOIs	https://doi.org/10.1103/PhysRevLett.115.212003
State	Published - Jan 1 2015

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Physical Sciences and Mathematics
Physics

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10.1103/PhysRevLett.115.212003License: CC BY

https://doi.org/10.1103/PhysRevLett.115.212003

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title = "Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions",

abstract = " Unpolarized and beam-polarized fourfold cross sections (d4\σ/dQ2dxBdtd\ϕ) for the ep\→e\′p\′\γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 (Q2,xB,t) bins over the widest phase space ever explored in the valence-quark region. Several models of generalized parton distributions (GPDs) describe the data well at most of our kinematics. This increases our confidence that we understand the GPD H, expected to be the dominant contributor to these observables. Through a leading-twist extraction of Compton form factors, these results support the model predictions of a larger nucleon size at lower quark-momentum fraction xB.",

author = "Hyon-Suk Jo and Angela Biselli",

year = "2015",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.115.212003",

language = "American English",

volume = "115",

journal = "Physical Review Letters",

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T1 - Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions

AU - Jo, Hyon-Suk

AU - Biselli, Angela

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Unpolarized and beam-polarized fourfold cross sections (d4σ/dQ2dxBdtdϕ) for the ep→e′p′γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 (Q2,xB,t) bins over the widest phase space ever explored in the valence-quark region. Several models of generalized parton distributions (GPDs) describe the data well at most of our kinematics. This increases our confidence that we understand the GPD H, expected to be the dominant contributor to these observables. Through a leading-twist extraction of Compton form factors, these results support the model predictions of a larger nucleon size at lower quark-momentum fraction xB.

AB - Unpolarized and beam-polarized fourfold cross sections (d4σ/dQ2dxBdtdϕ) for the ep→e′p′γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 (Q2,xB,t) bins over the widest phase space ever explored in the valence-quark region. Several models of generalized parton distributions (GPDs) describe the data well at most of our kinematics. This increases our confidence that we understand the GPD H, expected to be the dominant contributor to these observables. Through a leading-twist extraction of Compton form factors, these results support the model predictions of a larger nucleon size at lower quark-momentum fraction xB.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/173

UR - https://doi.org/10.1103/PhysRevLett.115.212003

U2 - 10.1103/PhysRevLett.115.212003

DO - 10.1103/PhysRevLett.115.212003

M3 - Article

VL - 115

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions

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