Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114894
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dc.contributor.authorAad, G.en
dc.contributor.authorAbbott, B.en
dc.contributor.authorAbdallah, J.en
dc.contributor.authorAbdinov, O.en
dc.contributor.authorAben, R.en
dc.contributor.authorAbolins, M.en
dc.contributor.authorAbouZeid, O.en
dc.contributor.authorAbramowicz, H.en
dc.contributor.authorAbreu, H.en
dc.contributor.authorAbreu, R.en
dc.contributor.authorAbulaiti, Y.en
dc.contributor.authorAcharya, B.en
dc.contributor.authorAdamczyk, L.en
dc.contributor.authorAdams, D.en
dc.contributor.authorAdelman, J.en
dc.contributor.authorAdomeit, S.en
dc.contributor.authorAdye, T.en
dc.contributor.authorAffolder, A.en
dc.contributor.authorAgatonovic-Jovin, T.en
dc.contributor.authorAguilar-Saavedra, J.en
dc.contributor.authoret al.en
dc.date.issued2016en
dc.identifier.citationEuropean Physical Journal C, 2016; 76(1):4-1-4-24en
dc.identifier.issn1434-6044en
dc.identifier.issn1434-6052en
dc.identifier.urihttp://hdl.handle.net/2440/114894-
dc.description.abstractThe decays B+c→J/ψD+s and B+c→J/ψD∗+s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb−1 of pp collisions collected at centre-of-mass energies s√=7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψ→μ+μ− and D(∗)+s→ϕπ+(γ/π0) decays. With a two-dimensional likelihood fit involving the B+c reconstructed invariant mass and an angle between the μ+ and D+s candidate momenta in the muon pair rest frame, the yields of B+c→J/ψD+s and B+c→J/ψD∗+s, and the transverse polarisation fraction in B+c→J/ψD∗+s decay are measured. The transverse polarisation fraction is determined to be Γ±±(B+c→J/ψD∗+s)/Γ(B+c→J/ψD∗+s)=0.38±0.23±0.07, and the derived ratio of the branching fractions of the two modes is BB+c→J/ψD∗+s/BB+c→J/ψD+s=2.8+1.2−0.8±0.3, where the first error is statistical and the second is systematic. Finally, a sample of B+c→J/ψπ+ decays is used to derive the ratios of branching fractions BB+c→J/ψD+s/BB+c→J/ψπ+=3.8±1.1±0.4±0.2 and BB+c→J/ψD∗+s/BB+c→J/ψπ+=10.4±3.1±1.5±0.6, where the third error corresponds to the uncertainty of the branching fraction of D+s→ϕ(K+K−)π+ decay. The available theoretical predictions are generally consistent with the measurement.en
dc.description.statementofresponsibilityG. Aad … Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Nitesh Soni … Martin White … et al. (ATLAS Collaboration)en
dc.language.isoenen
dc.publisherSpringeren
dc.rights© CERN for the benefit of the ATLAS collaboration 2015. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.en
dc.subjectATLAS Collaborationen
dc.titleStudy of the B⁺c → J/ψD⁺s and B⁺c →J/ψD*s⁺ decays with the ATLAS detectoren
dc.title.alternativeStudy of the B(+)c -> J/psiD(+)s and B(+)c ->J/psiD*s(+) decays with the ATLAS detectoren
dc.typeJournal articleen
dc.identifier.rmid0030045690en
dc.identifier.doi10.1140/epjc/s10052-015-3743-8en
dc.identifier.pubid195956-
pubs.library.collectionPhysics publicationsen
pubs.library.teamDS10en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
Appears in Collections:Physics publications

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