Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要:
A modified method for calculating the pion vacuum susceptibility from an effective quark-quark interaction model is derived. Within this approach it is shown that the pion vacuum susceptibility is free of ultraviolet divergence and is much smaller than the previous estimations. (C) 2003 Published by Elsevier B.V.
Zong, HS,Qi, S,Chen, W,et al. Pion susceptibility of the QCD vacuum from an effective quark-quark interaction[J]. PHYSICS LETTERS B,2003,576(40972):289-296.
