Excitations of the nucleon with dynamical fermions

Details Excitations of the nucleon with dynamical fermions Excitations of the nucleon with dynamical fermions

2002-09-30

arxiv.org/abs/hep-lat/0209165v1

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2002(spectrum) 3 pages, 4 figures

Scientific paper

We measure the spectrum of low-lying nucleon resonances using Bayesian fitting methods. We compare the masses obtained in the quenched approximation to those obtained with two flavours of dynamical fermions at a matched lattice spacing. At the pion masses employed in our simulations, we find that the mass of the first positive-parity nucleon excitation is always greater than that of the parity partner of the nucleon.

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