QCD Sum Rules and the Induced Pseudoscalar Coupling
Nuclear Theory
2010-04-19 v1
Abstract
We present an extension of the QCD sum rule method in the external fields so as to determine the induced pseudoscalar coupling constant g_P, which tests the validity of the partially conserved axial current (PCAC) hypothesis. This is essentially that we pick out the "higher-order" effects of both the hadron and quark (QCD) sides. A specific QCD sum rules for g_P is obtained and its prediction is briefly analyzed. It turns out that the final prediction on g_P is extremely stable. In view of the versatile nature of the present QCD sum rule methods, we appendix some discussions on the possible future of the method.
Cite
@article{arxiv.1004.2767,
title = {QCD Sum Rules and the Induced Pseudoscalar Coupling},
author = {E. M. Henley and W-Y. P. Hwang and L. S. Kisslinger},
journal= {arXiv preprint arXiv:1004.2767},
year = {2010}
}