24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Electromagnetic Form Factors through Parity-Expanded Variational Analysis

29 Jul 2016, 15:40
20m
Building B2a Room 2077 (Highfield Campus, University of Southampton)

Building B2a Room 2077

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Hadron Structure Hadron Structure

Speaker

Mr Finn M. Stokes (University of Adelaide)

Description

Variational analysis techniques in lattice QCD are powerful tools that give access to the full spectrum of QCD. At zero momentum, these techniques are well established and can cleanly isolate energy eigenstates of either positive or negative parity. In order to compute the form factors of a single energy eigenstate, we must perform a variational analysis at nonzero momentum. When we do this with baryons, we run into issues with parity mixing, as boosted baryons are not eigenstates of parity. I present the parity-expanded variational analysis (PEVA) technique, a novel method for ensuring the successful and consistent isolation of boosted baryons. This is achieved through a parity expansion of the operator basis used to construct the correlation matrix. Nucleon form factor calculations using this new technique are presented, showing the improvement over conventional methods.

Primary author

Mr Finn M. Stokes (University of Adelaide)

Co-authors

Dr Benjamin J. Owen (University of Adelaide) Prof. Derek B. Leinweber (University of Adelaide) Dr Waseem Kamleh (University of Adelaide)

Presentation Materials