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Properties of light scalar mesons from lattice QCD

McNeile, C. and Michael, C. (2006) Properties of light scalar mesons from lattice QCD. Physical Review D, 74 . Article Number: 014508. ISSN 550-2368 (online); 1550-7998 (print)

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Abstract

Lattice QCD with $N_f=2$ flavours of sea quark is used to explore the spectrum and decay of scalar mesons. We are able to determine the $b_1$ - $a_0$ mass difference and this leads to the conclusion that the lightest non-singlet scalar meson ($a_0$) has a mass of 1.01(4) GeV. We determine from the lattice the coupling strength to KK and $\pi \eta$. We compute the leptonic decay constant of the lightest non-singlet scalar meson. We discuss the impact of these lattice results on the interpretation of the $a_0(980)$ state. We also discuss $K^*_0$ states.

Item Type: Article LTH 694. arXiv Number: arXiv:hep-lat/0604009v2. Additional citation information: PHYSICAL REVIEW D 74, 014508 (2006); 1550-7998/2006/74(1)/014508(9). 9 Pages. Published 12 July 2006. Issue: July 2006. GAUGE FIELD THEORY; SU(3); FLAVOR; LEPTONIC DECAY; DECAY CONSTANT ; COUPLING; SCALAR MESON; HADRONIC DECAY; MASS SPECTRUM; A0(980); NUMERICAL CALCULATIONS; MONTE CARLO Q Science > QC Physics Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences 10.1103/PhysRevD.74.014508 ©2006 The American Physical Society http://arxiv.org/abs/hep-lat/0604009 Yes Published 377 27 Oct 2008 11:09 20 May 2011 16:47

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