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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Numerical study of QED finite-volume effects using lattice scalar QED

Jul 25, 2018, 4:30 PM
20m
105 (Kellogg Hotel and Conference Center)

105

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

Speaker

Mr James Harrison (University of Southampton)

Description

Finite-volume (FV) effects are expected to be large in the presence of QED, due to the long range of the electromagnetic interaction. With large efforts under way to include QED effects in lattice calculations, it is important to understand and correct for the associated FV effects. We calculate universal QED FV effects numerically, using an efficient method for lattice simulation of scalar QED. We find good agreement with analytical calculations of power-like FV corrections to the self-energy of scalar particles in moving frames, and to the hadronic vacuum polarisation (HVP), in the widely-used QED_L scheme. We also demonstrate the method of infrared improvement, in which FV effects are suppressed by altering a subset of the photon modes.

Primary author

Mr James Harrison (University of Southampton)

Co-authors

Dr Andreas Juettner (University of Southampton) Dr Antonin Portelli (University of Edinburgh) Prof. Johan Bijnens (Lund University) Prof. Martin Savage (INT) Mr Nils Hermansson Truedsson (Lund University) Dr Tadeusz Janowski (University of Edinburgh) Zohreh Davoudi (University of Maryland)

Presentation Materials