Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering  

作　　者：宋丽华 刘娜 段春贵 

机构地区：[1]Department of Physics, Hebei Normal University [2]College of Science, Hebei United University [3]College of Mathematics and Physics, Shijiazhuang University of Economics [4]Hebei Advanced Thin Films Laboratory

出　　处：《Chinese Physics C》2013年第8期29-33,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (11075044);Natural Science Foundation of Hebei Province (A2013209299)

摘　　要：Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440±0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A2/3 power law for quark hadronization occurring outside the nucleus,Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440±0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A2/3 power law for quark hadronization occurring outside the nucleus,

关 键 词：atomic mass dependence quark energy loss hadron production deep inelastic scattering 

分 类 号：O572.2[理学—粒子物理与原子核物理]