2020-03-30T13:44:47Z
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oai:digital.csic.es:10261/15647
2016-02-16T05:35:45Z
com_10261_61
com_10261_4
col_10261_314
The epsilon regime with Wilson fermions
Bar, O.
Necco, Silvia
Schaefer, S.
Chiral Lagrangians
Lattice QCD
31 pages, 2 figures.-- ISI Article Identifier: 000265600800006.-- Printed version published March 2009 .-- ArXiv pre-print avaible at: http://arxiv.org/abs/0812.2403
We study the impact of explicit chiral symmetry breaking of Wilson fermions on mesonic correlators in the is an element of-regime using Wilson chiral perturbation theory (WChPT). We generalize the is an element of-expansion of continuum ChPT to nonzero lattice spacings for various quark mass regimes. It turns out that the corrections due to a nonzero lattice spacing are highly suppressed for typical quark masses of the order a Lambda(2)(QCD). The lattice spacing effects become more pronounced for smaller quark masses and lead to non-trivial corrections of the continuum ChPT results at next-to-leading order. We compute these corrections for the standard current and density correlation functions. A fit to lattice data shows that these corrections are small, as expected.
Peer reviewed
2009-08-04T10:24:20Z
2009-08-04T10:24:20Z
2009-03-02
artÃculo
JHEP 0903:006,2009
1126-6708
http://hdl.handle.net/10261/15647
10.1088/1126-6708/2009/03/006
eng
http://dx.doi.org/10.1088/1126-6708/2009/03/006
openAccess
339830 bytes
application/pdf
Institute of Physics Publishing