Deeply Virtual Compton Scattering with CLAS
F.X. Girod (for the CLAS collaboration)
TL;DR
This paper reports measurements of beam spin asymmetries in ep -> epg reactions using CLAS, providing constraints on nucleon Generalized Parton Distributions and confirming twist-2 dominance predictions.
Contribution
It presents new experimental data on beam spin asymmetries in Deeply Virtual Compton Scattering with a wide kinematic coverage using the CLAS detector.
Findings
Asymmetries agree with twist-2 dominance predictions
Data constrains nucleon Generalized Parton Distributions
Use of a new lead-tungstate calorimeter enhances measurement accuracy
Abstract
The beam spin asymmetries of the reaction ep -> epg in the Bjorken regime were measured over a wide kinematical domain using the CLAS detector and a new lead-tungstate calorimeter. Through the interference of the Bethe-Heitler process with Deeply Virtual Compton Scattering, those asymmetries provide constraints for the nucleon Generalized Parton Distributions models. The observed shapes are in agreement with twist-2 dominance predictions.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research