Power Counting Regime of Chiral Extrapolation and Beyond

Details Power Counting Regime of Chiral Extrapolation and Beyond Power Counting Regime of Chiral Extrapolation and Beyond

2005-10-12

arxiv.org/abs/hep-lat/0510070v1

PoS LAT2005:048,2006

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2005 (hadron spectrum and quark masses), 6 pages, 2 figures

Scientific paper

Finite-range regularised (FRR) chiral effective field theory is presented in the context of approximation schemes ubiquitous in modern lattice QCD calculations. Using FRR techniques, the power-counting regime (PCR) of chiral perturbation theory can be estimated. To fourth-order in the expansion at the 1% tolerance level, we find m_\pi < 180 MeV for the PCR, extending only a small distance beyond the physical pion mass.

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