DVCS with longitudinally polarized target using CLAS at 6 GeV

Angela Biselli

doi:10.1063/1.3215721

DVCS with longitudinally polarized target using CLAS at 6 GeV

Angela Biselli

Fairfield University

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

Abstract

<p> Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single&hyphen;spin asymmetry (target SSA) in the reaction ep⃗→epγ is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely H̃, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6&hyphen;GeV polarized electron beam, a polarized solid&hyphen;state 14NH3 target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading&hyphen;order calculations is in the range of 20% to 40%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q2 region from 1 to 4 GeV2, xB from 0.15 to 0.55 and −t from 0.1 to 2 GeV2 providing new constraints on the GPDs.</p>

Original language	American English
Journal	AIP Conference Proceedings
Volume	1149
DOIs	https://doi.org/10.1063/1.3215721
State	Published - Jan 1 2009

Disciplines

Physical Sciences and Mathematics
Physics

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DVCS with longitudinally polarized target using CLAS at 6 GeVFinal published version, 1,000 KBLicense: CC BY

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@article{daf7b9afb4a8442fac0c7d55cd57af47,

title = "DVCS with longitudinally polarized target using CLAS at 6 GeV",

abstract = " Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single\&hyphen;spin asymmetry (target SSA) in the reaction ep⃗\→ep\γ is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely {\~H}, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6\&hyphen;GeV polarized electron beam, a polarized solid\&hyphen;state 14NH3 target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading\&hyphen;order calculations is in the range of 20\% to 40\%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q2 region from 1 to 4\ GeV2, xB from 0.15 to 0.55 and \−t from 0.1 to 2\ GeV2 providing new constraints on the GPDs.",

author = "Angela Biselli",

year = "2009",

month = jan,

day = "1",

doi = "10.1063/1.3215721",

language = "American English",

volume = "1149",

journal = "AIP Conference Proceedings",

}

TY - JOUR

T1 - DVCS with longitudinally polarized target using CLAS at 6 GeV

AU - Biselli, Angela

PY - 2009/1/1

Y1 - 2009/1/1

N2 - Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single&hyphen;spin asymmetry (target SSA) in the reaction ep⃗→epγ is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely H̃, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6&hyphen;GeV polarized electron beam, a polarized solid&hyphen;state 14NH3 target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading&hyphen;order calculations is in the range of 20% to 40%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q2 region from 1 to 4 GeV2, xB from 0.15 to 0.55 and −t from 0.1 to 2 GeV2 providing new constraints on the GPDs.

AB - Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single&hyphen;spin asymmetry (target SSA) in the reaction ep⃗→epγ is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely H̃, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6&hyphen;GeV polarized electron beam, a polarized solid&hyphen;state 14NH3 target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading&hyphen;order calculations is in the range of 20% to 40%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q2 region from 1 to 4 GeV2, xB from 0.15 to 0.55 and −t from 0.1 to 2 GeV2 providing new constraints on the GPDs.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/141

U2 - 10.1063/1.3215721

DO - 10.1063/1.3215721

M3 - Article

VL - 1149

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

ER -

DVCS with longitudinally polarized target using CLAS at 6 GeV

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