ρD^*D^* vertex from QCD sum rules

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dc.creatorBracco, M. E.
dc.creatorChiapparini, M.
dc.creatorNavarra, F. S.
dc.creatorNielsen, M.
dc.date2007-10-09
dc.date.accessioned2026-07-07T11:19:53Z
dc.date.available2026-07-07T11:19:53Z
dc.descriptionWe calculate the form factors and the coupling constant in the $ρD^* D^*$ vertex in the framework of QCD sum rules. We evaluate the three point correlation functions of the vertex considering both $ρ$ and $D^*$ mesons off--shell. The form factors obtained are very different but give the same coupling constant: $g_{ρD^* D^*} = 6.6 \pm 0.31$. This number is 50% larger than what we would expect from SU(4) estimates.
dc.description9 pages, 6 eps figures
dc.identifierhttps://arxiv.org/abs/0710.1878
dc.identifierhttp://arxiv.org/abs/0710.1878
dc.identifierPhys.Lett.B659:559-564,2008
dc.identifierdoi:10.1016/j.physletb.2007.11.066
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193842
dc.subjectHigh Energy Physics - Phenomenology
dc.titleρD^*D^* vertex from QCD sum rules
dc.typetext

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