A search for the very rare B∗0 → μ+μ−and B∗0s → μ+μ− decays is conducted by analysing the B+c → π+μ+μ− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1. The signal signatures correspond to simultaneous peaks in the μ+μ− and π+μ+μ− invariant masses. No evidence for an excess of events over background is observed for either signal decay mode. Upper limits at the 90% confidence level are set on the branching fractions relative to that for B+c → J/ψπ+ decays, RB∗0(μ+μ−)π+/J/ψπ+ < 3.8 × 10−5 and RB∗0s (μ+μ−)π+/J/ψπ+ < 5.0 × 10−5.
Search for $B_{(s)}^{*0}\rightarrow \mu ^+\mu ^-$ in $B_c^+\rightarrow \pi ^+\mu ^+\mu ^-$ decays
Brundu, D.;De Angelis, C.;Dettori, F.;Dordei, F.;Fabiano, F.;Litvinov, R.;Manca, G.;Oldeman, R.;Saitta, B.;Sun, J.;
2025-01-01
Abstract
A search for the very rare B∗0 → μ+μ−and B∗0s → μ+μ− decays is conducted by analysing the B+c → π+μ+μ− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1. The signal signatures correspond to simultaneous peaks in the μ+μ− and π+μ+μ− invariant masses. No evidence for an excess of events over background is observed for either signal decay mode. Upper limits at the 90% confidence level are set on the branching fractions relative to that for B+c → J/ψπ+ decays, RB∗0(μ+μ−)π+/J/ψπ+ < 3.8 × 10−5 and RB∗0s (μ+μ−)π+/J/ψπ+ < 5.0 × 10−5.File | Dimensione | Formato | |
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