Confirmation of the Double Charm Baryon Xi_cc+ via its Decay to p D+ K-

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dc.creatorThe SELEX Collaboration
dc.creatorOcherashvili, A.
dc.creatorMoinester, M. A.
dc.creatorRuss, J.
dc.creatorEngelfried, J.
dc.creatorTorres, I.
dc.date2004-06-11
dc.date2005-08-25
dc.date.accessioned2026-07-07T11:30:19Z
dc.date.available2026-07-07T11:30:19Z
dc.descriptionWe observes a signal for the double charm baryon Xi_cc+ in the charged decay mode Xi_cc+ -> p D+ K- to complement the previously reported decay Xi_cc+ -> Lambda_c K- pi+ in data from SELEX, the charm hadro-production experiment (E781) at Fermilab. In this new decay mode we observe an excess of 5.62 events over an expected background estimated by event mixing to be 1.38+/-0.13 events. The Poisson probability that a background fluctuation can produce the apparent signal is less than 6.4E-4. The observed mass of this state is (3518+/-3)MeV/c^2, consistent with the published result. Averaging the two results gives a mass of (3518.7+/-1.7)MeV/c^2. The observation of this new weak decay mode confirms the previous SELEX suggestion that this state is a double charm baryon. The relative branching ratio Gamma(Xi_cc+ -> pD+K-)/Gamma(Xi_cc+ -> Lambda_c K- pi+) = 0.36+/-0.21.
dc.description11 pages, 6 included eps figures. v2 includes improved statistical method to determine significance of observation. Submitted to PLB
dc.identifierhttps://arxiv.org/abs/hep-ex/0406033
dc.identifierhttp://arxiv.org/abs/hep-ex/0406033
dc.identifierPhys.Lett.B628:18-24,2005
dc.identifierdoi:10.1016/j.physletb.2005.09.043
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196976
dc.subjectHigh Energy Physics - Experiment
dc.titleConfirmation of the Double Charm Baryon Xi_cc+ via its Decay to p D+ K-
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