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Exploring the Roper resonance in Lattice QCD
2014
Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)
unpublished
Using a correlation matrix analysis consisting of a variety of smearings, the CSSM Lattice collaboration has successfully isolated states associated with the Roper resonance and other "exotic" excited states such as the Λ(1405) on the lattice at near-physical pion masses. We explore the nature of the Roper by examining the eigenvectors that arise from the variational analysis, demonstrating that the Roper state is dominated by the χ 1 nucleon interpolator and only poorly couples to χ 2 . By
doi:10.22323/1.187.0245
fatcat:pp7btnidhzfv3o67jsv3uens6a