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Abstract: Using the non-perturbative renormalization technique, we calculate therenormalization factors for quark bilinear operators made of overlap fermionson the lattice. The background gauge field is generated by the JLQCD and TWQCDcollaborations including dynamical effects of two or 2+1 flavors of lightquarks on a 16$^3\times$32 or 16$^3\times$48 lattice at lattice spacing around0.1 fm. By reducing the quark mass close to the chiral limit, where the finitevolume system enters the so-called $\epsilon$-regime, the unwanted effect ofspontaneous chiral symmetry breaking on the renormalization factors issuppressed. On the lattices in the conventional $p$-regime, this effect isprecisely subtracted by separately calculating the contributions from thechiral condensate.



Autor: J.Noaki, T.W.Chiu, H.Fukaya, S.Hashimoto, H.Matsufuru, T.Onogi, E.Shintani, N.Yamada

Fuente: https://arxiv.org/



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