We present a search for the charged lepton-flavor-violating decays Υ(1S)→ℓℓ′ and radiative charged lepton-flavour-violating decays Υ(1S)→γℓℓ′ [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 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.
Search for charged lepton flavor violating decays of Υ(1S)
F. Tenchini;
2022-01-01
Abstract
We present a search for the charged lepton-flavor-violating decays Υ(1S)→ℓℓ′ and radiative charged lepton-flavour-violating decays Υ(1S)→γℓℓ′ [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 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.File in questo prodotto:
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JHEP05(2022)095.pdf
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