Determination of SU(2) ChPT LECs from 2+1 flavor staggered lattice simulations

Autor:	Scholz, Enno E., Borsanyi, Szabolcs, Durr, Stephan, Fodor, Zoltan, Krieg, Stefan, Schafer, Andreas, Szabo, Kalman K.
Rok vydání:	2013
Předmět:	High Energy Physics - Lattice High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	By fitting pion masses and decay constants from 2+1 flavor staggered lattice simulations to the predictions of NLO and NNLO SU(2) chiral perturbation theory we determine the low-energy constants l_3 and l_4. The lattice ensembles were generated by the Wuppertal-Budapest collaboration and cover pion masses in the range of 135 to 435 MeV and lattice scales between 0.7 and 2.0 GeV. By choosing a suitable scaling trajectory, we were able to demonstrate that precise and stable results for the LECs can be obtained from continuum ChPT to NLO. The pion masses available in this work also allow us to study the applicability of using ChPT to extrapolate from higher masses to the physical pion mass. Comment: 8 pages, 8 figures, 1 table, talk presented at Xth Quark Confinement and the Hadron Spectrum, Munich, October 2012
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1301.7557 Zobrazit plný text záznamu View this record from Arxiv