SU(2) chiral perturbation theory low-energy constants from staggered 2+1 flavor simulations

Autor:	Scholz, Enno E., Borsanyi, Szabolcs, Durr, Stephan, Fodor, Zoltan, Katz, Sandor D., Krieg, Stefan, Schafer, Andreas, Szabo, Kalman K.
Rok vydání:	2011
Předmět:	High Energy Physics - Lattice High Energy Physics - Phenomenology
Zdroj:	PoS(Lattice2011)142
Druh dokumentu:	Working Paper
Popis:	We measure the pion mass and decay constant on ensembles generated by the Wuppertal-Budapest Collaboration, and extract the NLO low-energy constants l_3 and l_4 of SU(2) chiral perturbation theory. The data are generated in 2+1 flavor simulations with Symanzik glue and 2-fold stout-smeared staggered fermions, with pion masses varying from 135 MeV to 400 MeV, lattice scales between 0.7 GeV and 2.0 GeV, and m_s kept at its physical value. Furthermore, by excluding the lightest mass points, we are able to test the reliability of SU(2) chPT as a tool to extrapolate towards the physical point from higher pion masses. Comment: 7 pages, contribution to Lattice 2011, Squaw Valley, Lake Tahoe, California, July 2011
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1111.3729 Zobrazit plný text záznamu View this record from Arxiv