Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-11-24
Phys.Rev.D83:094505,2011
Physics
High Energy Physics
High Energy Physics - Lattice
26 pages, 6 figures. v2: reference added, 1 figure added, typo corrected, published in PRD
Scientific paper
10.1103/PhysRevD.83.094505
We perform a non-perturbative lattice calculation of the P-wave pion-pion scattering phase in the rho-meson decay channel using two flavors of maximally twisted mass fermions at pion masses ranging from 480 MeV to 290 MeV. Making use of finite-size methods, we evaluate the pion-pion scattering phase in the center-of-mass frame and two moving frames. Applying an effective range formula, we find a good description of our results for the scattering phase as a function of the energy covering the resonance region. This allows us to extract the rho-meson mass and decay width and to study their quark mass dependence.
Feng Xu
Jansen Karl
Renner Dru B.
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