The Constituent Chiral Quark Model revisited

作者：de Rafael Eduardo^*

来源：Physics Letters B, 2011, 703(1): 60-65.

DOI：10.1016/j.physletb.2011.07.046

We reconsider the Constituent Chiral Quark Model of Manohar and Georgi in the presence of SU(3)(L) x SU(3)(R) external sources. As recently emphasized by Weinberg, the corresponding effective Lagrangian is renormalizable in the large-N-c limit. We show, however, that the number of the required counterterms depends crucially on the value of g(A) and it is minimized for g(A) = 1. We then find that with a rather small value for the constituent quark mass, which we fix phenomenologically to M-Q = (190 +/- 40) MeV, the model reproduces rather well the values of several well-known low-energy constants. We also comment on the limitations of the model as well as on a few exceptional applications, to more complicated low-energy observables, where one can expect the model to make reasonably good predictions.

• 出版日期2011-9-1