小横动量半深度非弹性散射的量子色动力学因子化(英文)  

QCD Factorization for Semi-inclusive Deep-Inelastic Scattering at Low Transverse Momentum

作　　者：季向东[1] 马建平[2] 袁锋[1] 

机构地区：[1]美国马里兰大学物理系 [2]中国科学院理论物理所,北京100080

出　　处：《高能物理与核物理》2007年第9期857-859,共3页High Energy Physics and Nuclear Physics

摘　　要：论证了在小横动量区域内半深度非弹性散射量子色动力学因子化公式.为完成因子化,引进了依赖于横动量的部分子分布函数和碎裂函数,并扣除了软胶子辐射.在单圈图的情形下,证明了因子化的成立,同时论证了在微扰论的任意阶该因子化的正确性.We argue a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate the factorization, we introduce the transverse-momentum dependent patton distributions and fragmentation functions with gauge links slightly off the light-cone, and with soft-gluon radiations subtracted. We verify the factorization to one-loop order in perturbative quantum chromodynamics and argue that it is valid to all orders in perturbation theory.

关 键 词：半深度非弹性散射 量子色动力学 因子化 

分 类 号：O572.243[理学—粒子物理与原子核物理]