Numerical study of the mass spectrum in the 2D O(3) sigma model with a theta term

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dc.creatorAlles, B.
dc.creatorPapa, A.
dc.date2007-11-12
dc.date.accessioned2026-07-07T11:38:40Z
dc.date.available2026-07-07T11:38:40Z
dc.descriptionIt has been conjectured that the mass spectrum of the O(3) non-linear sigma model with a theta term in 2 dimensions may possess an excited state, which decays when theta is lowered from pi below a critical value. Since the direct numerical investigation of the model is prevented by a sign problem, we try to infer some information on the mass spectrum at real theta by studying the model at imaginary theta via analytic continuation. A modified Swendsen-Wang cluster algorithm has been introduced to simulate the model with the theta term.
dc.description7 pages. Latex source + 3 eps figures. Contribution to Lattice 2007, Regensburg, Germany, 30 July - 4 August 2007
dc.identifierhttps://arxiv.org/abs/0711.1803
dc.identifierhttp://arxiv.org/abs/0711.1803
dc.identifierPoSLAT2007:287,2007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199646
dc.subjectHigh Energy Physics - Lattice
dc.titleNumerical study of the mass spectrum in the 2D O(3) sigma model with a theta term
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