Searching for chiral logs in the static-light decay constant

Details Searching for chiral logs in the static-light decay constant Searching for chiral logs in the static-light decay constant

2004-11-11

arxiv.org/abs/hep-lat/0411014v1

JHEP0501:011,2005

Physics

High Energy Physics

High Energy Physics - Lattice

Scientific paper

10.1088/1126-6708/2005/01/011

Using the clover fermion action in unquenched QCD with pion masses as low as 420 MeV, we look for evidence for chiral logs in the static-light decay constant. There is some evidence for a chiral log term, if the original static theory of Eichten and Hill is used. However, the more precise data from the static action of the ALPHA collaboration do not show any evidence for non-linear dependence of the static-light decay constant on the light quark mass. We make some comments on the connection between chiral perturbation theory for decay constants of the pion and static-light meson.

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