European Twisted Mass Collaboration,
Remi Baron,
Phillip Boucaud,
Petros Dimopoulos,
Roberto Frezzotti,
David Palao,
Giancarlo Rossi,
Federico Farchioni,
Gernot Münster,
Tobias Sudmann,
Vicent Gimenez,
Gregorio Herdoiza,
Karl Jansen,
Vittorio Lubicz, Silvano Simula,
C. Michael,
L. Scorzato,
A. Shindler,
C. Urbach,
U. Wenger
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ABSTRACT: We present a comprehensive investigation of light meson physics using maximally twisted mass fermions for N
f
= 2 mass-degenerate quark flavours. By employing four values of the lattice spacing, spatial lattice extents ranging from
2.0 fm to 2.5 fm and pseudo scalar masses in the range 280 ≲ m
PS ≲ 650MeV we control the major systematic effects of our calculation. This enables us to confront our N
f
= 2 data with SU(2) chiral perturbation theory and extract low energy constants of the effective chiral Lagrangian and derived
quantities, such as the light quark mass.
KeywordsLattice QCD–Quark Masses and SM Parameters–QCD
Journal of High Energy Physics 04/2012; 2010(8):1-41. · 5.83 Impact Factor
