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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorLHCb Collaboration - CERN
dc.date.accessioned2021-07-02T15:32:14Z
dc.date.accessioned2023-07-13T09:51:43Z
dc.date.available2021-07-02T15:32:14Z
dc.date.available2023-07-13T09:51:43Z
dc.date.issued2011-08
dc.identifier.urihttp://hdl.handle.net/20.500.14342/2860
dc.description.abstractThe interference between Bs decays to J/ψϕ either directly or via Bs−B¯¯¯¯s oscillation gives rise to a CP violating phase ϕJψϕs. Using a sample of 8276±94 Bs→J/ψϕ events extracted from 337~pb−1 of pp collisions collected during the 2011 LHC run at s√=7~TeV, we fit for nine physics parameters, among which the phase ϕJψϕs, the decay width difference ΔΓs and the decay width Γs. For one of two ambiguous solutions (ϕJψϕs↔π−ϕJψϕs; ΔΓs↔−ΔΓs) we find ϕJψϕsΓsΔΓs===0.130.6560.123±±±0.180.0090.029(stat)(stat)(stat)±±±0.070.0080.011(syst)(syst)(syst)rad,ps−1,ps−1, in good agreement with the Standard Model predictions. This is the most precise measurement of ϕJψϕs and Γs. Furthermore, it is the first direct experimental evidence of a non-zero value of ΔΓs.eng
dc.format.extent18 p.cat
dc.language.isoengcat
dc.publisher25th International Symposium on Lepton Photon Interactions at High Energies, Mumbai, 22-27 of August 2011cat
dc.rightsAttribution 4.0 International
dc.rights© CERN
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherMesonscat
dc.subject.otherCol·lisions (Física nuclear)cat
dc.titleTagged time-dependent angular analysis of Bs→J/ψϕ decays with 337~pb−1 at LHCbcat
dc.typeinfo:eu-repo/semantics/conferenceObjectcat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc539


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Attribution 4.0 International
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