Light Meson Physics from Maximally Twisted Mass Lattice QCD

R. Baron , Ph. Boucaud , P. Dimopoulos , F. Farchioni , R. Frezzotti , V. Gimenez , G. Herdoiza , K. Jansen

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V. Lubicz C. Michael G. Muenster D. Palao G.C. Rossi L. Scorzato A. Shindler S. Simula T. Sudmann C. Urbach U. Wenger

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classification ✦ hep-lat

keywords latticelightmasschiralmaximallymesonphysicsquark

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We present a comprehensive investigation of light meson physics using maximally twisted mass fermions for two 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 MeV to 650 MeV we control the major systematic effects of our calculation. This enables us to confront our data with chiral perturbation theory and extract low energy constants of the effective chiral Lagrangian and derived quantities, such as the light quark mass, with high precision.

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FLAG Review 2024
hep-lat 2024-11 accept novelty 2.0

The FLAG 2024 review provides updated averages of lattice QCD determinations for quark masses, decay constants, form factors, mixing parameters, and nucleon matrix elements.