#### Pion-pion scattering amplitudes from $N_{\mathrm{f}}=2+1$ lattice QCD

- Event time: 2:00pm
- Event date: 19th October 2016
- Speaker: John Bulava (Trinity College, Dublin)
- Location: Higgs Centre Seminar Room, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

Lattice QCD calculations of scattering amplitudes have improved markedly thanks to advances in the algorithms which treat quark propagation. I will present recent calculations utilizing $N_{\mathrm{f}}=2+1$ dynamical quark flavors of the total isospin $I=1$ and $I=2$ elastic pion-pion scattering amplitudes and the isovector timelike pion form factor. This form factor is a prototypical resonance photo-production amplitude and is related to the low-energy hadronic vacuum polarization, making it relevant for phenomenology both in and beyond the Standard Model.

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..