Nuclear Physics Colloquium

Venue: Physics Building, Max-von-Laue-Str. 1, Seminar Room PHYS 2.116
Time: Wednesday, March 02, 2:00 pm (s.t.)
Contact: hees@fias.uni-frankfurt.de

Pion-pion scattering from Lattice QCD using the stochastic LapH method

Ben Hörz (Trinity College Dublin)

The calculation of infinite-volume hadron-hadron scattering amplitudes from Lattice QCD simulations requires precisely determined finite-volume energy spectra. This required level of precision is achieved through the stochastic LapH method, an efficient algorithm to treat the physically important low-lying modes of quark propagation. After reviewing the essentials of this method we show results for elastic pion-pion scattering amplitudes and determine a simple resonance photoproduction amplitude, the isovector timelike pion form factor, which is an important low-energy contribution to the hadronic vacuum polarization.