Tensor Charge of the Nucleon from QCD Sum Rules  

作　　者：HE Han-xin 

机构地区：[1]China Institute of Atomic Energy,Beijing 102413 [2]also Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080

出　　处：《Chinese Physics Letters》1996年第12期889-892,共4页中国物理快报（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China;the Nuclear Science Foundation of China.

摘　　要：The nucleon's tensor charges(isovector g_(T)^(v)=δu-δd and isoscalar g_(T)^(s)=δu+δd)are calculated using the QCD(quantum chromodynamics)sum rules in the presence of an external tensor field.By combining the mass sum rule of nucleon,we derive a simplified form for proton tensor charges,which gives g_(T)^(v)=1.27 and g_(T)^(s)=1.31,or δu=1.29 and δd=0.02 at the scale of nucleon mass,with an uncertainty about 20%.

关 键 词：FIELD TENSOR CHARGES 

分 类 号：O57[理学—粒子物理与原子核物理]