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Measurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment

2013-09-05Journal article Open access
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dc.contributor.authorCMS collaboration (2225 authors)
dc.contributor.authorHollar, Jonathan
dc.contributor.authorNayak, Aruna
dc.contributor.authorCalpas, Betty
dc.contributor.authorAlmeida, Nuno
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorNguyen, Federico
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSeixas, Joao
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorMusella, Pasquale
dc.contributor.authorSilva, Pedro
dc.contributor.authorPela, Joao
dc.contributor.authorLeonardo, Nuno
dc.date.accessioned2019-02-03T23:12:00Z
dc.date.available2019-02-03T23:12:00Z
dc.date.issued2013-09-05
dc.date.updated2019-02-03T23:12:00Z
dc.description.abstractResults are presented from a search for the rare decays B(s) to mu+ mu- and B0 to mu+ mu- in pp collisions at sqrt(s) = 7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 inverse femtobarns, respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(B(s) to mu+ mu-) = (3 +1.0/-0.9)E-9, where the uncertainty includes both statistical and systematic contributions. An excess of B(s) to mu+ mu- events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B0 to mu+ mu- an upper limit of B(B0 to mu+ mu-) < 1.1E-9 at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.
dc.description.versionPeer Reviewed
dc.identifierPhys.Rev.Lett. 111 (2013) 101804; DOI 10.1103/PhysRevLett.111.101804
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevLett.111.101804
dc.identifier.urihttp://hdl.handle.net/10400.26/26450
dc.language.isoeng
dc.titleMeasurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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