mixing in chiral theory of mesons
Dao-Neng Gao1 - Mu-Lin Yan2,3
1 Center for Fundamental Physics, University of Science and Technology of China,
Hefei, Anhui 230026, People's Republic of China
2 Chinese Center for Advanced Science and Technology (World Lab), P.O.Box 8730, Beijing, 100080, People's Republic of China - Mailing adress: Center for Fundamental Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Received: 30 January 1998 / Revised version: 3 June 1998 Communicated by W. Weise
In this paper, U(3)U(3)R chiral theory of mesons is extended to the leading order in quark mass expansion in order to evaluate the mixing. It is shown that the use of path integral method to integrate out the quark fields naturally leads to the mixing vertices, and this mixing is entirely from the quark loop in this theory. The off-shell behaviour of the mixing amplitude is analyzed. The on-shell mixing amplitude is obtained from the decay . Furthermore, the constraints on the light quark mass parameters are extracted from the mixing and the mesons masses, and the mass splitting of K*(892)-mesons is predicted.