Staggered chiral perturbation theory in the two-flavor case

Details Staggered chiral perturbation theory in the two-flavor case Staggered chiral perturbation theory in the two-flavor case

2009-11-13

arxiv.org/abs/0911.2534v2

Phys.Rev.D82:014016,2010

Physics

High Energy Physics

High Energy Physics - Lattice

Scientific paper

10.1103/PhysRevD.82.014016

I study two-flavor staggered chiral perturbation theory in the light pseudoscalar sector. The pion mass and decay constant are calculated through NLO in the partially-quenched case. In the limit where the strange quark mass is large compared to the light quark masses and the taste splittings, I show that the SU(2) staggered chiral theory emerges from the SU(3) staggered chiral theory, as expected. Explicit relations between SU(2) and SU(3) low energy constants and taste-violating parameters are given. The results are useful for SU(2) chiral fits to asqtad data and allow one to incorporate effects from varying strange quark masses.

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