WChPT analysis of twisted mass lattice data

Details WChPT analysis of twisted mass lattice data WChPT analysis of twisted mass lattice data

2006-10-13

arxiv.org/abs/hep-lat/0610085v1

Eur.Phys.J.A31:481,2007

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 4 ps figures. Talk given by O. Bar at QNP '06, Madrid

Scientific paper

We perform a Wilson Chiral Perturbation Theory (WChPT) analysis of quenched twisted mass lattice data. The data were generated by two independent groups with three different choices for the critical mass. For one choice, the so-called pion mass definition, one observes a strong curvature for small quark masses in various mesonic observables (''bending phenomenon''). Performing a combined fit to the next-to-leading (NLO) expressions, we find that WChPT describes the data very well and the fits provide very reasonable values for the low-energy parameters.

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