Measurement of theBs0→μ+μ−Branching Fraction and Search forB0→μ+μ−Decays at the LHCb Experiment

2013/07/31 by LHCb collaboration, R. Aaij, B. Adeva +659 · 4 citations
Mathematics · Physics and Astronomy · #Algorithm #Computer science #Confidence interval #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Statistics #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.111.101805

published as Phys. Rev. Lett. 111, 101805 (2013) · 12 pages, 3 figures, Phys. Rev. Lett. 111, 101805 (2013)

openalex publication_date 2013/09/05 · arxiv created 2013/09/10 · arxiv updated 2016/03/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A search for the rare decays B_s⁰\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath- and B⁰\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath- is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1 fb^\ensuremath-1 of pp collisions at a center-of-mass energy of 7 TeV and 2 fb^\ensuremath-1 at 8 TeV. An excess of B_s⁰\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath- 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_s⁰\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath-)=(2.9_\ensuremath-1.0^+1.1)\ifmmode×\else\texttimes\fi10^\ensuremath-9 is obtained and an upper limit of B(B⁰\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath-)<7.4\ifmmode×\else\texttimes\fi10^\ensuremath-10 at 95% confidence level is set. These results are consistent with the standard model expectations.

Citations

• Review of Particle Physics
• FakingBs→μ+μ−
• A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting
• Lattice QCD inputs to the CKM unitarity triangle analysis
• Presentation of search results: theCLstechnique
• Geant4 developments and applications
• Search for B_s⁰ → μ + μ − and B0 → μ + μ − decays

Cited by

• Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in s = 8 √(s)=8 TeV proton-proton collisions
• Probing the flavor violating scalar top quark signal at the LHC
• Flavor signatures of isosinglet vector-like down quark model
• SU(2)×U(1)Gauge Invariance and the Shape of New Physics in RareBDecays

Related

• Search for B_s⁰ → μ + μ − and B0 → μ + μ − decays
• The beauty of the rare: B_(s)→ μ⁺ μ^- at the LHCb
• Prospect for measuring the branching ratio of B_s→μμ at LHCb
• The branching fraction and effective lifetime of B_(s)⁰ → μ⁺ μ^- at LHCb with Run 1 and Run 2 data
• FakingBs→μ+μ−