Tensor Charge of the Nucleon from QCD Sum Rules
HE Han-xin
China Institute of Atomic Energy, Beijing 102413
also Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
Tensor Charge of the Nucleon from QCD Sum Rules
HE Han-xin
China Institute of Atomic Energy, Beijing 102413
also Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
关键词 ：
12.38.Lg ,
14.20.Dh
Abstract ： The nucleon's tensor charges (isovector gv T = δu - δd and isoscalar gs T = 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 gv T = 1.27 and gs T = 1.31, or δu = 1.29 and δd = 0.02 at the scale of nucleon mass, with an uncertainty about 20%.
Key words ：
12.38.Lg
14.20.Dh
出版日期: 1996-12-01
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1996, Vol. 13 
