Journal Article

FZJ-2013-00495

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png SU(2) chiral perturbation theory low-energy constants from 2+1 flavor staggered lattice simulations

Borsányi, S. (Corresponding author) ; Durr, S.FZJ* ; Fodor, Z.FZJ* ; Krieg, S.FZJ* ; Schäfer, A. ; Scholz, E. E. ; Szabó, K. K.

2013
Soc. [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/4941  doi:10.1103/PhysRevD.88.014513

Abstract: We extract the next-to-leading-order low-energy constants ℓ̅ 3 and ℓ̅ 4 of SU(2) chiral perturbation theory, based on precise lattice data for the pion mass and decay constant on ensembles generated by the Wuppertal-Budapest Collaboration for QCD thermodynamics. These ensembles feature 2+1 flavors of two-fold stout-smeared dynamical staggered fermions combined with Symanzik glue, with pion masses varying from 135 to 435 MeV, lattice scales between 0.7 and 2.0 GeV, while ms is kept fixed at its physical value. Moderate taste splittings and the scale being set through the pion decay constant allow us to restrict ourselves to the taste pseudoscalar state and to use formulas from continuum chiral perturbation theory. Finally, by dropping the data points near 135 MeV from the fits, we can explore the range of pion masses that is needed in SU(2) chiral perturbation theory to reliably extrapolate to the physical point.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)

Appears in the scientific report 2013

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Database coverage:
; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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