Lattice study of meson correlators in the {epsilon}-regime of two-flavor QCD

Journal Article · Tue Apr 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.074503· OSTI ID:21249952

Fukaya, H ^[1]; Aoki, S ^[2]; Hashimoto, S; Kaneko, T; Yamada, N ^[3]; Matsufuru, H; Noaki, J ^[3]; Ogawa, K ^[4]; Onogi, T ^[5]

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1. Niels Bohr Institute, Niels Bohr International Academy, Blegdamsvej 17 DK-2100 Copenhagen O Denmark (Denmark)
2. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571 (Japan)
3. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan)
4. Physics Department, Center for Theoretical Sciences, and National Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan (China)
5. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

We calculate mesonic two-point functions in the {epsilon}-regime of two-flavor QCD on the lattice with exact chiral symmetry. We use gauge configurations of size 16{sup 3}x32 at a{approx}0.11 fm generated with dynamical overlap fermions. The sea quark mass is fixed at around 3 MeV and the valence quark mass is varied in the range 1-4 MeV, both of which are in the {epsilon}-regime. We find a good consistency with the expectations from the next-to-leading order calculation in the {epsilon}-expansion of (partially quenched) chiral perturbation theory. From a fit we obtain the pion decay constant F=87.3(5.6) MeV and the chiral condensate {sigma}{sup MS}=[239.8(4.0) MeV]{sup 3} up to next-to-next-to-leading order contributions.

• OSTI ID: 21249952
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CHIRALITY
CONDENSATES
CONFIGURATION
EXPANSION
FLAVOR MODEL
MASS
MEV RANGE
PARTICLE DECAY
PERTURBATION THEORY
PIONS
QUANTUM CHROMODYNAMICS
QUARKS
SIMULATION
VALENCE