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arXiv 1004.3463hep-lathep-th
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格点量子色动力学中Ginsparg-Wilson费米子的宇称实现

Parity Realization in Lattice QCD with Ginsparg-Wilson Fermions

V. Azcoiti, G. Di Carlo, E. Follana, A. Vaquero

摘要:

Vafa-Witten关于宇称和味对称在QCD真空中实现的论证不适用于两种能够再现手征反常的QCD晶格正则化:Wilson费米子和Ginsparg-Wilson费米子。我们在这里展示了如何使用最后的正则化,可以得到,从第一性原理,这些对称性的更标准的序参量采取一个消失的真空期望值为任何数量的味道,如果夸克有一个非零质量。

英文摘要:

The Vafa-Witten arguments on the realization of parity and flavour symmetries in the QCD vacuum do not apply to two lattice regularizations of QCD which are able to reproduce the chiral anomaly: Wilson fermions and Ginsparg-Wilson fermions. We show here how using the last regularization one can get, from first principles, that the more standard order parameters for these symmetries take a vanishing vacuum expectation value for any number of flavours, if quarks have a non-vanishing mass.

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