Taste non-Goldstone, flavor-charged pseudo-Goldstone boson decay   constants in staggered chiral perturbation theory
  We calculate the axial current decay constants of taste non-Goldstone pions and kaons in staggered chiral perturbation theory through next-to-leading order. The results are a simple generalization of the results for the taste Goldstone case. New low-energy couplings are limited to analytic corrections that vanish in the continuum limit; certain coefficients of the chiral logarithms are modified, but they contain no new couplings. We report results for quenched, fully dynamical, and partially quenched cases of interest in the chiral SU(3) and SU(2) theories. 
Jon A. Bailey, Weonjong Lee, Boram Yoon
hep-lat hep-ph