arXiv:hep-ph/0310004·v1·High Energy Physics — Phenomenology
Pion susceptibility of the QCD vacuum from an effective quark-quark interaction
Hong-shi Zong🇨🇳 · Shi Qi🇨🇳 · Wei Chen🇨🇳 · Wei-min Sun🇨🇳 · En-guang Zhao🇨🇳
Abstract
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.
Comments: 13 pages, 2 figures