Deeply virtual compton scattering at HERMES

• Published in: Chinese physics C Vol. 34; no. 9; pp. 1476 - 1478
• Main Author: 俞伟林
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.09.2010; Physikalisches Institut,Justus-Liebig-Universit(a)t Gie(β)en,Heinrich-Buff-Ring 16,35392 Gie(β)en,Germany
• Subjects: Compton散射; 反冲质子; 截面梁; 极化测量; 核子结构; 直接检测; 角动量; nucleon structure; compton scattering; QCD
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/34/9/076

Generalized Parton Distributions （GPDs） provide a way to access total angular momenta of partons and give a multidimensional picture of the nucleon structure.Deeply Virtual Compton Scattering （DVCS） is the most direct exclusive process to study GPDs.Different azimuthal cross-section asymmetries with respect to beam helicity,beam charge,and target polarization have been measured in the HERMES experiment.A recoil detector was installed at HERMES to directly detect the recoil proton.