Staggered chiral perturbation theory in the two-flavor case and SU(2) analysis of the MILC data

Details Staggered chiral perturbation theory in the two-flavor case and SU(2) analysis of the MILC data Staggered chiral perturbation theory in the two-flavor case and SU(2) analysis of the MILC data

2010-11-08

arxiv.org/abs/1011.1792v1

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, talk given at the XXVIII International Symposium on Lattice Filed Theory, June 14-19,2010, Villasimius, Sardinia Ital

Scientific paper

In the light pseudoscalar sector, we study rooted staggered chiral perturbation theory in the two-flavor case. The pion mass and decay constant are calculated through NLO for a partially-quenched theory. In the limit where the strange quark mass is large compared to the light quark masses and the taste splittings, we 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. A brief summary of updated SU(2) chiral fits to the MILC lattice data is presented.

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