000004539 001__ 4539
000004539 005__ 20241008094605.0
000004539 037__ $$aBELLE2-TALK-CONF-2024-125
000004539 041__ $$aeng
000004539 088__ $$aBELLE2-TALK-DRAFT-2024-126
000004539 100__ $$aPaolo Leo
000004539 245__ $$aSearches for CLFV in tau and hadron decays at Belle and Belle II
000004539 260__ $$a25th International Workshop on Neutrinos from Accelerators$$c2024-09-16
000004539 300__ $$amult. p
000004539 520__ $$aRates of lepton-flavor violation in charged lepton decays are enhanced in many beyond-the-standard-model theories. The low-background samples of e+e−→τ+τ− events collected by Belle and Belle II allow world-leading searches for such decays with tau leptons. We present Belle II results for the decays τ→ℓV0, where V0 is a neutral vector meson, τ→3μ, τ→Λπ and τ→Λ¯π (which violates both baryon and lepton number conservation) using data samples up to 424 fb−1. We also present Belle searches for the charged lepton-flavor-violating (CLFV) decays Bs→ℓτ and Υ(2S)→ℓτ. We present searches for the for the baryon and lepton number violating decays D→pℓ by analyzing 921 fb−1 of data collected by Belle at and 60 MeV below the Υ(4S) resonance, and at the Υ(5S) resonance. Finally, we present a search for B0→K0Sτℓ using a combined Belle and Belle II data set.
000004539 8560_ $$fdjaffe@bnl.gov
000004539 8564_ $$uhttps://docs.belle2.org/record/4539/files/BELLE2-TALK-CONF-2024-125.pdf