Mass and width of the lowest resonance in QCD

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dc.creatorCaprini, Irinel
dc.creatorColangelo, Gilberto
dc.creatorLeutwyler, Heinrich
dc.date2005-12-29
dc.date2006-04-07
dc.date.accessioned2026-07-07T10:29:49Z
dc.date.available2026-07-07T10:29:49Z
dc.descriptionWe demonstrate that near the threshold, the pi pi scattering amplitude contains a pole with the quantum numbers of the vacuum - commonly referred to as the sigma - and determine its mass and width within small uncertainties. Our derivation does not involve models or parametrizations, but relies on a straightforward calculation based on the Roy equation for the isoscalar S-wave.
dc.descriptionRevtex, 4 pages, 2 figures, two refences added, minor text changes, version appeared in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/hep-ph/0512364
dc.identifierhttp://arxiv.org/abs/hep-ph/0512364
dc.identifierPhys.Rev.Lett.96:132001,2006
dc.identifierdoi:10.1103/PhysRevLett.96.132001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177942
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMass and width of the lowest resonance in QCD
dc.typetext

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