Determining the low energy parameters of Wilson Chiral Perturbation Theory
arXiv:hep-lat/0509002
Abstract
We report preliminary results of a Wilson Chiral Perturbation Theory (WChPT) analysis of twisted mass lattice QCD data. The quenched data, previously published by two different groups, was generated with two definitions for the critical quark mass and shows a strong non-linear quark mass dependence for small quark masses for the pion mass definition (``bending phenomenon''). We find that WChPT describes this characteristic curvature fairly well. Fits to the data provide estimates for combinations of low-energy parameters, even though the errors are sizable.
arXiv comment6 pages, 5 figures. Talk presented at Lattice2005(spectrum), Dublin, July 25-30, 2005. v2: One reference added
References in corpus (14)
- Chiral Perturbation Theory for the Quenched Approximation of QCD
- Quenched Chiral Logarithms
- Chirally improving Wilson fermions
- Twisted mass chiral perturbation theory at next-to-leading order
- The phase diagram of twisted mass lattice QCD
- Pion mass splitting and phase structure in Twisted Mass QCD
- O(a) improved twisted mass lattice QCD
- On the phase structure of twisted mass lattice QCD
- Quenched Scaling of Wilson twisted mass fermions
- Spectrum of quenched twisted mass lattice QCD at maximal twist
- Flavour Breaking Effects of Wilson twisted mass fermions
- Light quarks with twisted mass fermions
- Light hadron spectroscopy in two-flavor QCD with small sea quark masses
- Going chiral: overlap versus twisted mass fermions