Nucleon axial charge from quenched lattice QCD with domain wall fermions and improved gauge action

Shoichi Sasaki; Tom Blum; Shigemi Ohta; Kostas Orginos

doi:10.1016/S0920-5632(01)01695-4

Nucleon axial charge from quenched lattice QCD with domain wall fermions and improved gauge action

Shoichi Sasaki, Tom Blum, Shigemi Ohta, Kostas Orginos

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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 g_A had a fairly strong dependence on the quark mass. A simple linear extrapolation of g_A 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.

Original language	English
Pages (from-to)	302-304
Number of pages	3
Journal	Nuclear Physics B - Proceedings Supplements
Volume	106-107
DOIs	https://doi.org/10.1016/S0920-5632(01)01695-4
Publication status	Published - 2002 Mar
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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10.1016/S0920-5632(01)01695-4

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title = "Nucleon axial charge from quenched lattice QCD with domain wall fermions and improved gauge action",

abstract = "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.",

author = "Shoichi Sasaki and Tom Blum and Shigemi Ohta and Kostas Orginos",

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journal = "Nuclear and Particle Physics Proceedings",

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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

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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