Photon Structure Function Revisited  

作　　者：Christoph Berger 

机构地区：[1]I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany

出　　处：《Journal of Modern Physics》2015年第8期1023-1043,共21页现代物理（英文）

摘　　要：The flux of papers from electron positron colliders containing data on the photon structure function ended naturally around 2005. It is thus timely to review the theoretical basis and confront the predictions with a summary of the experimental results. The discussion will focus on the increase of the structure function with x (for x away from the boundaries) and its rise with , both characteristics being dramatically different from hadronic structure functions. The agreement of the experimental observations with the theoretical calculations is a striking success of QCD. It also allows a new determination of the QCD coupling constant which very well corresponds to the values quoted in the literature.The flux of papers from electron positron colliders containing data on the photon structure function ended naturally around 2005. It is thus timely to review the theoretical basis and confront the predictions with a summary of the experimental results. The discussion will focus on the increase of the structure function with x (for x away from the boundaries) and its rise with , both characteristics being dramatically different from hadronic structure functions. The agreement of the experimental observations with the theoretical calculations is a striking success of QCD. It also allows a new determination of the QCD coupling constant which very well corresponds to the values quoted in the literature.

关 键 词：STRUCTURE FUNCTIONS PHOTON STRUCTURE Two PHOTON PHYSICS QCD QCD Coupling CONSTANT 

分 类 号：O57[理学—粒子物理与原子核物理]