2015•arXiv (Cornell University)Open access
Pion-pion scattering and the timelike pion form factor from\n $N_{\\mathrm{f}} = 2+1$ lattice QCD simulations using the stochastic LapH\n method
John Bulava, Ben Hörz, Brendan Fahy, K. J. Juge, Colin Morningstar, Chik Him Wong
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Abstract
We report on progress applying the stochastic LapH method to estimate\nall-to-all propagators required in correlation functions of multi-hadron\noperators relevant for pion-pion scattering. Large-volume results for $I=2$ and\n$I=1$ pion-pion scattering phase shifts with good statistical precision are\nobtained from an $N_{\\rm f} = 2+1$ anisotropic Wilson clover ensemble with\n$m_{\\pi} = 240\\mathrm{MeV}$. We also present a preliminary determination of the\n$I=1$ pion-pion scattering phase shift and timelike pion form factor on an\nisotropic $N_{\\rm f}=2+1$ flavour ensemble generated by the Coordinated Lattice\nSimulation (CLS) community effort.\n
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