Effects of non-perturbatively improved dynamical fermions in UKQCD simulations

Details Effects of non-perturbatively improved dynamical fermions in UKQCD simulations Effects of non-perturbatively improved dynamical fermions in UKQCD simulations

2000-10-09

arxiv.org/abs/hep-lat/0010012v2

Nucl.Phys.Proc.Suppl. 94 (2001) 242-245

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2000 (Spectrum and quark masses), 4 pages, 5 figures

Scientific paper

10.1016/S0920-5632(01)00965-3

We present results for QCD with 2 degenerate flavours of quark using a non-perturbatively improved action on a lattice volume of $16^3\times32$ where the bare gauge coupling and bare dynamical quark mass have been chosen to maintain a fixed physical lattice spacing and volume (1.71 fm). By comparing measurements from these matched ensembles, including quenched ones, we find evidence of dynamical quark effects on the short distance static potential, the scalar glueball mass and the topological susceptibility. There is little evidence of effects on the light hadron spectrum over the range of quark masses studied ($m_{\pi}/m_{\rho}\geq 0.60$).

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