Sigma pole position and errors of a once and twice subtracted dispersive analysis of pi-pi scattering data

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dc.creatorKaminski, R.
dc.creatorGarcia-Martin, R.
dc.creatorGrynkiewicz, P.
dc.creatorPelaez, J. R.
dc.date2008-11-27
dc.date2009-03-25
dc.date.accessioned2026-07-07T13:09:44Z
dc.date.available2026-07-07T13:09:44Z
dc.descriptionWe show how the new precise data on kaon decays together with forward dispersion relations, sum rules and once- and twice-subtracted Roy's equations allow for a precise determination of the sigma meson pole position. We present a comparison and a study of the different sources of uncertainties when using either once- or twice-subtracted Roy's equations to analyze the data. Finally we present a preliminary determination of the sigma pole from the constrained dispersive data analysis.
dc.description4 pages, 6 figures. Contribution to the proceedings of the QCD08 14th International QCD Conference. 7-12th July 2008 Montpellier (France); one reference removed, changed errors in Eqs (4), (5) and (7)
dc.identifierhttps://arxiv.org/abs/0811.4510
dc.identifierhttp://arxiv.org/abs/0811.4510
dc.identifierNucl.Phys.Proc.Suppl.186:318-321,2009
dc.identifierdoi:10.1016/j.nuclphysbps.2008.12.071
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228836
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSigma pole position and errors of a once and twice subtracted dispersive analysis of pi-pi scattering data
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