Two-flavor lattice QCD simulation in the epsilon-regime with exact chiral symmetry - INSPIRE

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Two-flavor lattice QCD simulation in the epsilon-regime with exact chiral symmetry

JLQCD

Collaboration

•

H. Fukaya
(
- Wako, RIKEN
)

Feb, 2007

10 pages

Published in:

Phys.Rev.Lett. 98 (2007) 172001

e-Print:

hep-lat/0702003 [hep-lat]

DOI:

10.1103/PhysRevLett.98.172001

Report number:

RIKEN-TH-91,
UTHEP-538,
KEK-CP-191,
YITP-07-4,
NTUTH-07-505A

View in:

ADS Abstract Service

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Abstract:

We perform lattice simulations of two-flavor QCD using Neuberger's overlap fermion, with which the exact chiral symmetry is realized at finite lattice spacings. The epsilon-regime is reached by decreasing the light quark mass down to 3 MeV on a 16^3 32 lattice with a lattice spacing \sim 0.11 fm. We find a good agreement of the low-lying Dirac eigenvalue spectrum with the analytical predictions of the chiral random matrix theory, which reduces to the chiral perturbation theory in the epsilon-regime. The chiral condensate is extracted as \Sigma(2 GeV) = (251(7)(11) MeV)^3, where the errors are statistical and an estimate of the higher order effects in the epsilon-expansion.

12.38.Gc
11.30.Rd
11.15.Ha
quantum chromodynamics
lattice field theory
flavor: 2
symmetry: chiral
fermion: overlap
matrix model: random
operator: Dirac

References(24)

Figures(0)

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