Scalar glueball and meson spectroscopy in unquenched lattice QCD with improved staggered quarks

Details Scalar glueball and meson spectroscopy in unquenched lattice QCD with improved staggered quarks Scalar glueball and meson spectroscopy in unquenched lattice QCD with improved staggered quarks

2005-10-11

arxiv.org/abs/hep-lat/0510066v1

PoS LAT2005 (2005) 027

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2005 (hadron spectrum and quark masses), 6 pages, 4 figures

Scientific paper

We present results of an exploratory study of singlet scalar states in unquenched QCD using both glueball and meson operators. Results for non-singlet non-strange scalar mesons are also presented. We use Asqtad improved staggered fermions and gauge configurations generated by the MILC collaboration at lattice spacings of .12 and .09 fm. In this formulation, the glueball mass is not significantly different from the quenched value at finite lattice spacing. Significant taste violations are present in the scalar sector. At light quark masses, decay channels complicate the mass determinations. There is some evidence that the non-strange singlet meson lies below the non-singlet meson.

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