Nonperturbative renormalization of bilinear operators with dynamical overlap fermions
PHYSICAL REVIEW D(2010)
Abstract
Using the nonperturbative renormalization technique, we calculate the renormalization factors for quark bilinear operators made of overlap fermions on the lattice. The background gauge field is generated by the JLQCD and TWQCD Collaborations, including dynamical effects of two or 2 + 1 flavors of light quarks on a 16(3) x 32 or 16(3) x 48 lattice at lattice spacing around 0.1 fm. By reducing the quark mass close to the chiral limit, where the finite volume system enters the so-called is an element of regime, the unwanted effect of spontaneous chiral symmetry breaking on the renormalization factors is suppressed. On the lattices in the conventional p regime, this effect is precisely subtracted by separately calculating the contributions from the chiral condensate.
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Key words
mathematical model,quark model,gauge field,lattice gauge theory,finite volume,symmetry breaking,simulation,chirality,mathematical models,lattice qcd,renormalization,symmetry,chiral symmetry breaking,fermions,quarks,perturbation theory,mass,elementary particles
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