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Measurement of the B 0 s → μ + μ − Branching Fraction and Search for B 0 → μ + μ − Decays at the LHCb Experiment
dc.contributor | Universitat Ramon Llull. La Salle | |
dc.contributor | CERN | |
dc.contributor.author | Badalov, Alexey | |
dc.contributor.author | Calvo Gómez, Míriam | |
dc.contributor.author | Camboni, Alessandro | |
dc.contributor.author | Vilasís Cardona, Xavier | |
dc.contributor.author | LHCb Collaboration - CERN | |
dc.date.accessioned | 2021-04-26T17:32:39Z | |
dc.date.accessioned | 2023-10-02T06:49:20Z | |
dc.date.available | 2021-04-26T17:32:39Z | |
dc.date.available | 2023-10-02T06:49:20Z | |
dc.date.created | 2013-07 | |
dc.date.issued | 2013-09 | |
dc.identifier.uri | http://hdl.handle.net/20.500.14342/3495 | |
dc.description.abstract | A search for the rare decays B 0 s → μ + μ − and B 0 → μ + μ − is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1 fb − 1 of p p collisions at a center-of-mass energy of 7 TeV and 2 fb − 1 at 8 TeV. An excess of B 0 s → μ + μ − signal candidates with respect to the background expectation is seen with a significance of 4.0 standard deviations. A time-integrated branching fraction of B ( B 0 s → μ + μ − ) = ( 2.9 + 1.1 − 1.0 ) × 10 − 9 is obtained and an upper limit of B ( B 0 → μ + μ − ) < 7.4 × 10 − 10 at 95% confidence level is set. These results are consistent with the standard model expectations. | eng |
dc.format.extent | 9 p. | cat |
dc.language.iso | eng | cat |
dc.publisher | American Physical Society | cat |
dc.relation.ispartof | Physical Review Letters, 2013, Vol. 111, No. 10 | cat |
dc.rights | Attribution 4.0 International | |
dc.rights | © CERN | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.source | RECERCAT (Dipòsit de la Recerca de Catalunya) | |
dc.subject.other | Gran col·lisionador d'hadrons (França i Suïssa) | cat |
dc.subject.other | Interaccions d'hadrons | cat |
dc.subject.other | Partícules (Física nuclear) | cat |
dc.subject.other | Col·lisions (Física nuclear) | cat |
dc.title | Measurement of the B 0 s → μ + μ − Branching Fraction and Search for B 0 → μ + μ − Decays at the LHCb Experiment | cat |
dc.type | info:eu-repo/semantics/article | cat |
dc.type | info:eu-repo/semantics/publishedVersion | cat |
dc.rights.accessLevel | info:eu-repo/semantics/openAccess | |
dc.embargo.terms | cap | cat |
dc.subject.udc | 539 | |
dc.identifier.doi | https://doi.org/10.1103/PhysRevLett.111.101805 | cat |