arXivDaily arXiv每日学术速递 周一至周五更新
看起来今天可以划水了
arXiv 0905.0804hep-lat
收藏

Wilson手征微扰理论中的矢量流和轴流

Vector and Axial Currents in Wilson Chiral Perturbation Theory

Sinya Aoki, Oliver Bar, Stephen R. Sharpe

摘要:

我们重新考虑了Wilson手征微扰理论(WChPT)中矢量流和轴向矢量流的构造,该理论是一种低能有效的含Wilson费米子的格点量子色动力学理论.我们详细讨论了有限重整化的电流,必须考虑到,以适当地匹配的电流。我们明确表明,对电流施加手征沃德恒等式通常会影响O(a)处的轴向矢量电流。作为我们结果的应用,我们计算了双味理论中的π衰变常数。我们的结果不同于以前发表的。

英文摘要:

We reconsider the construction of the vector and axial-vector currents in Wilson Chiral Perturbation Theory (WChPT), the low-energy effective theory for lattice QCD with Wilson fermions. We discuss in detail the finite renormalization of the currents that has to be taken into account in order to properly match the currents. We explicitly show that imposing the chiral Ward identities on the currents does, in general, affect the axial-vector current at O(a). As an application of our results we compute the pion decay constant to one loop in the two flavor theory. Our result differs from previously published ones.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑