Study of the rare B[0 over s] and B[superscript 0] decays into the π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] final state
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Collaboration-2015-Study of the rare Bs.pdf
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Author(s)
Counts, Ian Thomas Hunt
Ilten, Philip J
Williams, Michael
Date Issued
February 2015
Journal
Physics Letters B
Publisher
Elsevier
Citation
“Study of the rare B[0 over s] and B[superscript 0] decays into the π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] final state” Physics Letters B 743 (April 2015): 46–55.
Version
Final published version
Abstract
A search for the rare decays B[0 over s]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] and B[superscript 0]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] is performed in a data set corresponding to an integrated luminosity of 3.0 fb[superscript −1] collected by the LHCb detector in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5–1.3 [GeV over c superscript 2] and with muon pairs that do not originate from a resonance are considered. The first observation of the decay B[0 over s]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] and the first evidence of the decay B[superscript 0]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(B[0 over s]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −])=(8.6±1.5 (stat)±0.7 (syst)±0.7(norm))×10[superscript −8] and B(B[0 over s]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −])=(2.11±0.51(stat)±0.15(syst)±0.16(norm))×10[superscript −8], where the third uncertainty is due to the branching fraction of the decay B[superscript 0]→[J over ψ(→μ[superscript +]μ[superscript −])K*(892)[superscript 0](→K[superscript +]π[superscript −]), used as a normalisation.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2015.02.010
