We present the results of a search for the b→dℓ+ ℓ- flavor-changing neutral-current rare decays B+,0→(η,ω,π+,0,ρ+,0)e+e- and B+,0→(η,ω,π0,ρ+)μ+μ- using a 711 fb-1 data sample that contains 772×106 BB¯ events. The data were collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no evidence for signal and set upper limits on branching fractions at the 90% confidence level in the range (3.8-47)×10-8 depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels B+,0→(ω,ρ+,0)e+e- and B+,0→(ω,ρ+)μ+μ-.

Search for Rare b → dℓ+ℓ− Transitions at Belle

Bianchi, F.;Biswas, D.;Das, S.;Destefanis, M.;Maggiora, M.;Mussa, R.;Spataro, S.;Tamponi, U.;
2024-01-01

Abstract

We present the results of a search for the b→dℓ+ ℓ- flavor-changing neutral-current rare decays B+,0→(η,ω,π+,0,ρ+,0)e+e- and B+,0→(η,ω,π0,ρ+)μ+μ- using a 711 fb-1 data sample that contains 772×106 BB¯ events. The data were collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no evidence for signal and set upper limits on branching fractions at the 90% confidence level in the range (3.8-47)×10-8 depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels B+,0→(ω,ρ+,0)e+e- and B+,0→(ω,ρ+)μ+μ-.
2024
133
10
101804-1
101804-8
quark b; rare decays
Adachi, I.; Aggarwal, L.; Aihara, H.; Akopov, N.; Aloisio, A.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, V.; Aversano, M.; Ayad, R.; Babu, V.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2069444
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