TY - JOUR
T1 - Nucleon axial charge from quenched lattice QCD with domain wall fermions and improved gauge action
AU - Sasaki, Shoichi
AU - Blum, Tom
AU - Ohta, Shigemi
AU - Orginos, Kostas
N1 - Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2002/3
Y1 - 2002/3
N2 - In our previous DWF calculation with the Wilson gauge action at β = 6.0 (a-1 ≃ 1.9 GeV) on a 163 × 32 × 16 lattice, we found that gA had a fairly strong dependence on the quark mass. A simple linear extrapolation of gA to the chiral limit yielded a value that was almost a factor of two smaller than the experimental one. Here we report our recent study of this issue. In particular, we investigate possible errors arising from finite lattice volume, especially in the lighter quark mass region. We employ a RG-improved gauge action (DBW2), which maintains very good chiral behavior even on a coarse lattice (a-1 ≃ 1.3 GeV), in order to perform simulations at large physical volume (> (2fm)3). Our preliminary results suggest that the finite volume effect is significant.
AB - In our previous DWF calculation with the Wilson gauge action at β = 6.0 (a-1 ≃ 1.9 GeV) on a 163 × 32 × 16 lattice, we found that gA had a fairly strong dependence on the quark mass. A simple linear extrapolation of gA to the chiral limit yielded a value that was almost a factor of two smaller than the experimental one. Here we report our recent study of this issue. In particular, we investigate possible errors arising from finite lattice volume, especially in the lighter quark mass region. We employ a RG-improved gauge action (DBW2), which maintains very good chiral behavior even on a coarse lattice (a-1 ≃ 1.3 GeV), in order to perform simulations at large physical volume (> (2fm)3). Our preliminary results suggest that the finite volume effect is significant.
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U2 - 10.1016/S0920-5632(01)01695-4
DO - 10.1016/S0920-5632(01)01695-4
M3 - Article
AN - SCOPUS:0036525212
VL - 106-107
SP - 302
EP - 304
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
SN - 2405-6014
ER -