The paper "Search for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample" in which Noritsugu Tsuzuki has contributed as the main author, was published in the Journal of High Energy Physics.
This paper reports on the search for lepton-flavor-violation (LFV) events in 10 different tau lepton decay modes.
This LFV search contributes to the discussion about new physics models (leptoquark models, etc.) that are motivated by the muon g-2 measurements or B meson anomalies.
They improved the search region by 30% from the previous paper by revising the event selection and analyzing the full data set of the Belle experiment.
No significant signal candidates were observed, and they set the most stringent 90% credibility level upper limits on the branching fractions.
More information about the paper are reported below.
N.Tsuzuki, et al., " Search for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample"
[J. High Energ. Phys. 2023, 118 (2023). DOI:https://doi.org/10.1007/JHEP06(2023)118]