Glueballs and topology with O(a)-improved lattice QCD

Details Glueballs and topology with O(a)-improved lattice QCD Glueballs and topology with O(a)-improved lattice QCD

2001-10-19

arxiv.org/abs/hep-lat/0110167v1

Nucl.Phys.Proc.Suppl. 106 (2002) 575-577

Physics

High Energy Physics

High Energy Physics - Lattice

4pp LaTeX, 4 EPS figures. Contribution to Lattice2001(confinement)

Scientific paper

We present evidence for unquenching effects in N_f=2, 16^3 32 ensembles by comparing with `equivalent' quenched data at r_0~5.0. A (small) VEV for torelons signals (weak) string breaking. A 15-20 % reduction in the scalar glueball mass relative to quenched is argued to be (in part at least) a discretisation effect. We find a chiral suppression of the topological susceptibility consistent with expectations, and agreement between fermionic and gluonic methods for measuring the topological charge.

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