Journal Article/Contribution to a conference proceedings

FZJ-2013-06584

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Determination of SU(2) ChPT LECs from 2+1 flavor staggered lattice simulations

Scholz, E. E. (Corresponding author) ; Borsanyi, S. ; Durr, S.FZJ* ; Fodor, Z. ; Krieg, S.FZJ* ; Schafer, A. ; Szabo, K. K.

2013
SISSA Trieste

Please use a persistent id in citations: http://hdl.handle.net/2128/10207

Abstract: 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.

Note: arXiv:1301.7557

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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:

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