Patra, S.S.PatraBhardwaj, V.V.BhardwajTrabelsi, K.K.TrabelsiAdachi, I.I.AdachiAihara, H.H.AiharaAl Said, S.S.Al SaidAsner, D. M.D. M.AsnerAtmacan, H.H.AtmacanAushev, T.T.AushevAyad, R.R.AyadDas, S.S.DasFrey, A.A.FreyHernandez, M.M.HernandezJin, Y.Y.JinLi, J.J.LiLi, Y.Y.LiPaul, S.S.Paul2022-06-012022-08-162022-06-012022-08-162022-05-16Journal of High Energy Physics. 2022 May 16;2022(5):95https://resolver.sub.uni-goettingen.de/purl?gro-2/108422https://resolver.sub.uni-goettingen.de/purl?gro-2/112737Abstract We present a search for the charged lepton-flavor-violating decays ϒ(1S) → ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1S) mesons produced in ϒ(2S) → π+π− ϒ(1S) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level.enCC BY 4.0https://creativecommons.org/licenses/by/4.0e +-e − Experimentsjournal_article10.1007/JHEP05(2022)0952022-07-29The Author(s)18383