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

DOI10.1016/S0920-5632(01)01782-0zbMATH Open1097.81866arXivhep-lat/0110167MaRDI QIDQ1348501

V. Pereyra

Publication date: 12 May 2002

Published in: Nuclear Physics. B. Proceedings Supplements (Search for Journal in Brave)

Abstract: 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.

Full work available at URL: https://arxiv.org/abs/hep-lat/0110167

zbMATH Keywords

string breakingchiral topological susceptibility suppressionunquenching effects

Mathematics Subject Classification ID

Strong interaction, including quantum chromodynamics (81V05) Quantum field theory on lattices (81T25)

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