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Search for the decay B 0 → ϕμ + μ

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Aaij, R 
Abdelmotteleb, ASW 
Abellán Beteta, C 
Abudinén, F 
Ackernley, T 


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 Bs0→ϕμ+μ decay, is established. Using the measured Bs0→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.



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

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Journal of High Energy Physics

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Springer Science and Business Media LLC