A search for the decay B0 → ϕ μ+ 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 → ϕ μ+ 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 → ϕ μ+ μ− decay, is established. Using the measured Bs0 → ϕ μ+ μ− branching fraction and assuming a phase-space model, the absolute branching fraction of the decay B0 → ϕ μ+ μ− in the full q^2 range is determined to be less than 3.2 × 10^−9 at a 90% credibility level.

Search for the Decay B0 → ϕ μ+ μ−

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
2022

Abstract

A search for the decay B0 → ϕ μ+ 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 → ϕ μ+ 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 → ϕ μ+ μ− decay, is established. Using the measured Bs0 → ϕ μ+ μ− branching fraction and assuming a phase-space model, the absolute branching fraction of the decay B0 → ϕ μ+ μ− in the full q^2 range is determined to be less than 3.2 × 10^−9 at a 90% credibility level.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500489
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