The $\Delta_{mix}$ parameter in the overlap on domain-wall mixed action - INSPIRE

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The $\Delta_{mix}$ parameter in the overlap on domain-wall mixed action

M. Lujan
(
- George Washington U.
)
,
A. Alexandru
(
- George Washington U.
)
,
Y. Chen
(
- Beijing, Inst. High Energy Phys.
)
,
T. Draper
(
- Kentucky U.
)
,
W. Freeman
(
- George Washington U.
)

Apr, 2012

6 pages

Published in:

Phys.Rev.D 86 (2012) 014501

e-Print:

1204.6256 [hep-lat]

DOI:

10.1103/PhysRevD.86.014501

View in:

reference search31 citations

Citations per year

Abstract: (arXiv)

A direct calculation of the mixed-action parameter

\Delta_{mix}

with valence overlap fermions on a domain-wall fermion sea is presented. The calculation is performed on four ensembles of the 2+1-flavor domain-wall gauge configurations:

24^3 \times 64

(

a m_l= 0.005

, a=0.114\fm) and

32^3 \times 64

(

a m_l = 0.004, 0.006, 0.008

, a=0.085\fm). For pion masses close to 300\MeV we find \hbox{\Delta_{mix}=0.030(6)\GeV^4} at a=0.114\fm and \Delta_{mix}=0.033(12)\GeV^4 at a=0.085\fm. The results are quite independent of the lattice spacing and they are significantly smaller than the results for valence domain-wall fermions on Asqtad sea or those of valence overlap fermions on clover sea. Combining the results extracted from these two ensembles, we get \Delta_{mix}=0.030(6)(5)\GeV^4, where the first error is statistical and the second is the systematic error associated with the fitting method.

Note:

6 pages, 6 figures

12.38.Gc
11.30.Rd
12.39.Fe
fermion: domain wall
fermion: overlap
fermion: sea
error: statistical
pi: mass
valence
lattice

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