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. [Figure not available: see fulltext.]

Search for the decay B 0 → ϕμ + μ −

Audurier B.;Belin S.;Brundu D.;Bursche A.;Cardini A.;Dettori F.;Litvinov R.;Manca G.;Muzzetto P.;Oldeman R.;Saitta B.;
2022-01-01

Abstract

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. [Figure not available: see fulltext.]
2022
B Physics; Branching fraction; Hadron-Hadron Scattering; Rare Decay
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/343725
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