Search for the decay B0 → ϕμ+μ−

Mick Mulder, K. De Bruyn, C. J. G. Onderwater, M. van Veghel, LHCb Collaboration

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A search for the decay B0 → ϕμ+μ− is performed using proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV collected by the LHCb experiment and corresponding to an integrated luminosity of 9 fb−1. No evidence for the B0 → ϕμ+μ− decay is found and an upper limit on the branching fraction, excluding the ϕ and charmonium regions in the dimuon spectrum, of 4.4 × 10−3 at a 90% credibility level, relative to that of the B0s → ϕμ+μ− decay, is established. Using the measured B0s → ϕμ+μ− branching fraction and assuming a phase-space model, the absolute branching fraction of the decay B0 → ϕμ+μ− in the full q2 range is determined to be less than 3.2 × 10−9 at a 90% credibility level.

Original languageEnglish
Article number67
JournalJournal of High Energy Physics
Issue number5
Publication statusPublished - 11-May-2022


  • B Physics
  • Branching fraction
  • Hadron-Hadron Scattering
  • Rare Decay

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