We report a search for the charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays using a 25 fb−1 Υ(2S) sample collected by the Belle detector at the KEKB e+e− asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions (B) at 90% confidence level. We obtain the most stringent upper limits: B(Υ(2S) → μ∓τ±) < 0.23 × 10−6 and B(Υ(2S) → e∓τ±) < 1.12 × 10−6.

Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle / Dhamija, R., Nishida, S., Giri, A., Adachi, I., Aihara, H., Asner, D.M., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, S., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Biswas, D., Bodrov, D., Borah, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:2(2024). [10.1007/JHEP02(2024)187]

Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle

Campajola M.;De Nardo G.;Di Capua F.;Merola M.;Pardi S.;Russo Guido;
2024

Abstract

We report a search for the charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays using a 25 fb−1 Υ(2S) sample collected by the Belle detector at the KEKB e+e− asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions (B) at 90% confidence level. We obtain the most stringent upper limits: B(Υ(2S) → μ∓τ±) < 0.23 × 10−6 and B(Υ(2S) → e∓τ±) < 1.12 × 10−6.
2024
Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle / Dhamija, R., Nishida, S., Giri, A., Adachi, I., Aihara, H., Asner, D.M., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, S., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Biswas, D., Bodrov, D., Borah, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:2(2024). [10.1007/JHEP02(2024)187]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/968980
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