Non-perturbative improvement of the axial current in $N_f$=3 lattice QCD with Wilson fermions and tree-level improved gauge action - INSPIRE

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Non-perturbative improvement of the axial current in $N_f$ =3 lattice QCD with Wilson fermions and tree-level improved gauge action

ALPHA

Collaboration

•

John Bulava
(
- Trinity Coll., Dublin
)

Feb 17, 2015

14 pages

Published in:

Nucl.Phys.B 896 (2015) 555-568

Published: May 6, 2015

e-Print:

1502.04999 [hep-lat]

DOI:

10.1016/j.nuclphysb.2015.05.003

Report number:

TCDMATH-15-01,
MS-TP-15-02,
CP3-ORIGINS-2015-001,
DIAS-2015-1

Experiments:

LATTICE-ALPHA

View in:

ADS Abstract Service

reference search57 citations

Citations per year

Abstract: (Elsevier)

The coefficient cA required for O(a) improvement of the axial current in lattice QCD with Nf=3 flavors of Wilson fermions and the tree-level Symanzik-improved gauge action is determined non-perturbatively. The standard improvement condition using Schrödinger functional boundary conditions is employed at constant physics for a range of couplings relevant for simulations at lattice spacings of ≈0.09 fm and below. We define the improvement condition projected onto the zero topological charge sector of the theory, in order to avoid the problem of possibly insufficient tunneling between topological sectors in our simulations at the smallest bare coupling. An interpolation formula for cA(g02) is provided together with our final results.

Note:

16 pages including figures and tables, latex2e; version published in Nucl. Phys. B, small additions to the text and references added, results unchanged

quark: Wilson
fermion: clover
current: axial
lattice field theory
quantum chromodynamics
tree approximation
nonperturbative
quark: flavor: 3
numerical calculations
lattice: effect

References(37)

Figures(7)

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