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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorCamboni, Alessandro
dc.contributor.authorVilasís Cardona, Xavier
dc.contributor.authorLHCb Collaboration - CERN
dc.date.accessioned2020-11-21T09:34:39Z
dc.date.accessioned2023-10-02T06:25:46Z
dc.date.available2020-11-21T09:34:39Z
dc.date.available2023-10-02T06:25:46Z
dc.date.created2013
dc.date.issued2013-10-28
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3097
dc.description.abstractThe first observation of the decay B0s→ϕK¯¯¯¯¯∗0 is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at s√=7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B0s→(K+K−)(K−π+) decays is found in the mass windows 1012.5 < M (K + K −) < 1026.5 MeV/c 2 and 746 < M(K − π +) < 1046 MeV/c 2. The signal yield is found to be dominated by B0s→ϕK¯¯¯¯¯∗0 decays, and the corresponding branching fraction is measured to be B(B0s→ϕK¯¯¯¯¯∗0) = (1.10 ± 0.24 (stat) ± 0.14 (syst) ± 0.08 (f d /f s )) × 10−6, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions f d /f s which accounts for the different production rate of B 0 and B0s mesons. The significance of B0s→ϕK¯¯¯¯¯∗0 signal is 6.1 standard deviations. The fraction of longitudinal polarization in B0s→ϕK¯¯¯¯¯∗0 decays is found to be f 0 = 0.51 ± 0.15 (stat) ± 0.07 (syst).eng
dc.format.extent22 p.cat
dc.language.isoengcat
dc.publisherSpringercat
dc.relation.ispartofJournal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre)cat
dc.rights© CERN
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherGran col·lisionador d'hadrons (França i Suïssa)cat
dc.subject.otherPartícules (Física nuclear)cat
dc.subject.otherMesonscat
dc.titleFirst observation of the decay B0s→ϕK¯¯¯¯¯∗0cat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc539
dc.identifier.doihttps://doi.org/10.1007/JHEP11(2013)092cat


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