In-medium spectral change of omega mesons as a probe of QCD four-quark condensate

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dc.creatorZschocke, S.
dc.creatorPavlenko, O. P.
dc.creatorKampfer, B.
dc.date2002-12-16
dc.date.accessioned2026-07-07T11:31:21Z
dc.date.available2026-07-07T11:31:21Z
dc.descriptionWithin QCD sum rules at finite baryon density we show the crucial role of four-quark condensates for the in-medium modification of the omega meson spectral function. In particular, such a global property as the sign of the in-medium omega meson mass shift is found to be governed by a parameter which describes the strength of the density dependence of the four-quark condensate beyond mean-field approximation. To study self-consistently the broadening of the omega meson resonance we employ a hadron spectral function based on the omega meson propagator delivered by an effective chiral Lagrangian. Measurements of the omega meson spectral change in heavy-ion collisions with the HADES detector can reveal the yet unknown density dependence of the four-quark condensate.
dc.identifierhttps://arxiv.org/abs/hep-ph/0212201
dc.identifierhttp://arxiv.org/abs/hep-ph/0212201
dc.identifierPhys.Lett.B562:57-62,2003
dc.identifierdoi:10.1016/S0370-2693(03)00551-3
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197241
dc.subjectHigh Energy Physics - Phenomenology
dc.titleIn-medium spectral change of omega mesons as a probe of QCD four-quark condensate
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