Nonperturbative renormalization of bilinear operators with dynamical overlap fermions

Journal Article · Mon Feb 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.034502· OSTI ID:21409188

Noaki, J; Matsufuru, H ^[1]; Chiu, T W ^[2]; Fukaya, H ^[3]; Hashimoto, S; Yamada, N ^[1]; Onogi, T; Shintani, E ^[4]

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1. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan)
2. Physics Department, Center for Quantum Science and Engineering, and Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan (China)
3. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
4. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

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{sup 3}x32 or 16{sup 3}x48 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 {epsilon} 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.

• OSTI ID: 21409188
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CHIRALITY
COMPOSITE MODELS
COMPUTERIZED SIMULATION
CONDENSATES
D QUARKS
FERMIONS
FLAVOR MODEL
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
PERTURBATION THEORY
QUARK MODEL
QUARKS
RENORMALIZATION
SIMULATION
SYMMETRY
SYMMETRY BREAKING
U QUARKS