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Paper detail

QCD Sum Rules and the Induced Pseudoscalar Coupling

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.

preprint2010arXivOpen access
E. M. HenleyW-Y. P. HwangL. S. Kisslinger
nucl-th
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E. M. HenleyW-Y. P. HwangL. S. Kisslinger

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