Pion-nucleon sigma term and strangeness in nucleon

作者：Chen; H

来源：Chinese Physics Letters, 1997, 14(4): 252-254.

It is shown that the meson exchange interaction between dynamical quarks generated by the chiral symmetry breaking is of crucial importance to explain the empirical value of the pion-nucleon sigma-term. The large contribution of (s) over bar s and gluon to a nucleon mass is predicted by using the QCD energy-momentum trace anomaly from the pion-nucleon sigma-term.

• 出版日期1997
• 单位中国科学院高能物理研究所