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Measurement of the CP-violating weak phase $\phi_s$ and the decay width difference $\Delta \Gamma_s$ using the B$_s^0 \to J/\psi\phi$(1020) decay channel in pp collisions at $\sqrt{s}=$ 8 TeV

dc.contributor.authorCMS collaboration (2310 authors)
dc.contributor.authorHollar, Jonathan
dc.contributor.authorCalpas, Betty
dc.contributor.authorNayak, Aruna
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorDi Francesco, Agostino
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorLeonardo, Nuno
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorNguyen, Federico
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSeixas, Joao
dc.contributor.authorToldaiev, Oleksii
dc.contributor.authorVadruccio, Daniele
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorSilva, Pedro
dc.contributor.authorMusella, Pasquale
dc.contributor.authorPela, Joao
dc.date.accessioned2019-02-04T07:33:22Z
dc.date.available2019-02-04T07:33:22Z
dc.date.issued2016-06-10
dc.date.updated2019-02-04T07:33:22Z
dc.description.abstractThe CP-violating weak phase ϕs of the Bs0 meson and the decay width difference ΔΓs of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0→J/ψϕ(1020)→μ+μ−K+K− decays. The analysed data set corresponds to an integrated luminosity of 19.7fb−1 collected in pp collisions at a centre-of-mass energy of 8TeV . A total of 49 200 reconstructed Bs0 decays are used to extract the values of ϕs and ΔΓs by performing a time-dependent and flavour-tagged angular analysis of the μ+μ−K+K− final state. The weak phase is measured to be ϕs=−0.075±0.097(stat)±0.031(syst) rad , and the decay width difference is ΔΓs=0.095±0.013(stat)±0.007(syst) ps−1 .
dc.description.versionPeer Reviewed
dc.identifierPhys.Lett. B757 (2016) 97-120; DOI 10.1016/j.physletb.2016.03.046
dc.identifier.urihttp://dx.doi.org/10.1016/j.physletb.2016.03.046
dc.identifier.urihttp://hdl.handle.net/10400.26/26893
dc.language.isoeng
dc.titleMeasurement of the CP-violating weak phase $\phi_s$ and the decay width difference $\Delta \Gamma_s$ using the B$_s^0 \to J/\psi\phi$(1020) decay channel in pp collisions at $\sqrt{s}=$ 8 TeV
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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