Effects of non-perturbatively improved dynamical fermions in UKQCD simulations

Abstract

We present results for QCD with 2 degenerate flavours of quark using a non-perturbatively improved action on a lattice volume of $16^3\times 32$ 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 ($m_{\pi }/m_{\rho }\ge 0.60$).

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

References in corpus (2)

• O(a) improvement of lattice QCD with two flavors of Wilson quarks
• Recent Results from the CP-PACS Collaboration

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• Sea quark effects in B_K from N_f=2 clover-improved Wilson fermions
• Sea quark effects in B_K from N_f=2 clover-improved Wilson fermions
• Recent Lattice QCD Results from the UKQCD Collaboration