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Quenched spectrum with staggered fermions
Phys. Rev. D 43, 2003 – Published 15 March, 1991
DOI: https://doi.org/10.1103/PhysRevD.43.2003
Abstract
We present results for the spectrum of QCD in the quenched approximation using staggered fermions at . We use extended wall sources, which give a better projection onto the ground state, and allow us to study many nonlocal pion and states, as well as the baryon. Staggered flavor-symmetry breaking reduces dramatically from . For , the ratio lies significantly below 1.5 for . At we study finite-volume effects using ×40 and ×40 lattices. We reanalyze our old data at and resolve the problem of the anomalously light scalar state.
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