Speaker
Waseem Kamleh
(University of Adelaide)
Description
The notable absence of a low-lying energy level in the positive parity sector of the nucleon excitation spectrum in lattice QCD has been a point of interest for some time. Speculation about the potential role of chiral symmetry in the lattice nucleon spectrum has arisen recently as a possible explanation for this absence. We endeavour to address this issue through a systematic comparison of the clover and overlap fermion actions through direct ratios of mass-matched nucleon correlators and state of the art correlation matrix techniques. In particular, these results have implications for our understanding of the nature of the N*(1440), or Roper resonance.
Primary author
Waseem Kamleh
(University of Adelaide)
Co-authors
Adam Virgili
(University of Adelaide)
Derek Leinweber
(University of Adelaide)
