1203.4769 (Hee-Jung Lee et al.)

Parity-violating $πN N$ coupling constant in the chiral quark-soliton
model    [PDF]

Hee-Jung Lee, Chang Ho Hyun, Hyun-Chul Kim

We investigate the parity-violating $\pi NN$ Yukawa coupling constant $h^1_{\pi NN}$ within the framework of the SU(2) chiral quark-soliton model, based on the $\Delta S=0$ effective weak Lagrangian derived within the same framework. We find that the parity-violating $\pi NN$ coupling constant is about $1\times10^{-8}$ at the scale of 1 GeV. The results of $h_{\pi NN}^1$ turn out to be sensitive to the Wilson coefficient. We discuss how the gluonic renormalization supresses the parity-violating $\pi NN$ coupling constant.

View original: http://arxiv.org/abs/1203.4769