# Charged hadrons in finite volume

#### Charged hadrons in finite volume

- Event time: 2:00pm
- Event date: 28th November 2018
- Speaker: Martin Hansen (Roma Tor Vergata)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

In this talk I will discuss a gauge invariant strategy for defining charged hadrons in lattice simulations of QCD+QED. In fact, constructing a gauge invariant interpolating operator for a charged state is simple in infinite volume, but when moving to finite volume we first have to circumvent an intrinsic issue with QED known as the zero-mode problem. After this issue is understood, I will present a particular solution that allows for a completely gauge invariant description of QED in finite volume. In the proposed setup, gauge fixing is possible at any stage, but I will argue that one always has to be careful when choosing to calculate observables in fixed gauge. Finally, I will say a few words about the numerical implementation of the proposed setup and then I present some results to prove the numerical viability.

#### Event resources

### 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..