Disentangling two- and four-quark state pictures of the charmed scalar mesons

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dc.creatorBracco, M. E.
dc.creatorLozea, A.
dc.creatorMatheus, R. D.
dc.creatorNavarra, F. S.
dc.creatorNielsen, M.
dc.date2005-03-14
dc.date2005-08-16
dc.date.accessioned2026-07-07T10:29:26Z
dc.date.available2026-07-07T10:29:26Z
dc.descriptionWe suggest that the recently observed charmed scalar mesons $D_0^{0}(2308)$ (BELLE) and $D_0^{0,+}(2405)$ (FOCUS) are considered as different resonances. Using the QCD sum rule approach we investigate the possible four-quark structure of these mesons and also of the very narrow $D_{sJ}^{+}(2317)$, firstly observed by BABAR. We use diquak-antidiquark currents and work to the order of $m_s$ in full QCD, without relying on $1/m_c$ expansion. Our results indicate that a four-quark structure is acceptable for the resonances observed by BELLE and BABAR: $D_0^{0}(2308)$ and $D_{sJ}^{+}(2317)$ respectively, but not for the resonances observed by FOCUS: $D_0^{0,+}(2405)$.
dc.descriptioncorrected misprints, one figure added, accepted for publication in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-ph/0503137
dc.identifierhttp://arxiv.org/abs/hep-ph/0503137
dc.identifierPhys.Lett.B624:217-222,2005
dc.identifierdoi:10.1016/j.physletb.2005.08.037
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177804
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleDisentangling two- and four-quark state pictures of the charmed scalar mesons
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