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@ARTICLE{Orth:48657,
author = {Orth, B. and Lippert, T. and Schilling, K.},
title = {{F}inite-{S}ize {E}ffects in {L}attice {QCD} with
{D}ynamical {W}ilson {F}ermions},
journal = {Physical review / D},
volume = {72},
number = {1},
issn = {1550-7998},
address = {[S.l.]},
publisher = {Soc.},
reportid = {PreJuSER-48657},
pages = {014503},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {As computing resources are limited, choosing the parameters
for a full lattice QCD simulation always amounts to a
compromise between the competing objectives of a lattice
spacing as small, quarks as light, and a volume as large as
possible. Aiming to push unquenched simulations with the
Wilson action towards the computationally expensive regime
of small quark masses we address the question whether one
can possibly save computing time by extrapolating results
from small lattices to the infinite volume, prior to the
usual chiral and continuum extrapolations. In the present
work the systematic volume dependence of simulated pion and
nucleon masses is investigated and compared with a
long-standing analytic formula by Luscher and with results
from chiral perturbation theory (ChPT). We analyze data from
hybrid Monte Carlo simulations with the standard
(unimproved) two-flavor Wilson action at two different
lattice spacings of a approximate to 0.08 and 0.13 fm. The
quark masses considered correspond to approximately $85\%$
and $50\%$ (at the smaller a) and $36\%$ (at the larger a)
of the strange quark mass. At each quark mass we study at
least three different lattices with L/a=10 to 24 sites in
the spatial directions (L=0.85-2.08 fm). We find that an
exponential ansatz fits the volume dependence of the pion
masses well, but with a coefficient about an order of
magnitude larger than the theoretical leading-order
prediction. In the case of the nucleon we observe a
remarkably good agreement between our lattice data and a
recent formula from relativistic baryon ChPT.},
keywords = {J (WoSType)},
cin = {ZAM},
ddc = {530},
cid = {I:(DE-Juel1)VDB62},
pnm = {Betrieb und Weiterentwicklung des Höchstleistungsrechners},
pid = {G:(DE-Juel1)FUEK254},
shelfmark = {Astronomy $\&$ Astrophysics / Physics, Particles $\&$
Fields},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000230889400040},
doi = {10.1103/PhysRevD.72.014503},
url = {https://juser.fz-juelich.de/record/48657},
}