# Extracting the timelike pion form factor from $\pi\pi$ scattering in lattice QCD

#### Extracting the timelike pion form factor from $\pi\pi$ scattering in lattice QCD

- Event time: 2:00pm
- Event date: 4th April 2018
- Speaker: Felix Erben (Johannes Gutenberg-Universität Mainz)
- Location: Higgs Centre Seminar Room, 4305 James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

I will present results from an ongoing study of the $\rho$ resonance in lattice QCD. The study of unstable states is challenging in numerical Euclidean field theory. With only one open channel, this is a benchmark system to study. It is furthermore interesting because it gives access to a calculation of the timelike pion form factor. This study also integrates with the existing Mainz programme for the calculation of the hadronic vacuum polarization contribution to the muon $g-2$. The current study focuses on CLS 2-flavour lattices with pion masses ranging from $275$ to $451$ $\mathrm{MeV}$ using $\mathcal{O}(a)$ improved Wilson fermions.

### About Particle Physics Theory seminars

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..