Search for the lepton-flavour-violating decays B0 → K*0τ±e∓
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13130_2025_Article_27702.pdf
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adefisoye, A. A.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Agapopoulou, C.
Date Issued
November 26, 2025
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. Search for the lepton-flavour-violating decays B0 → K*0τ±e∓. J. High Energ. Phys. 2025, 172 (2025).
Version
Final published version
Abstract
A first search at LHCb for the lepton-flavour-violating decays B0 → K*0τ±e∓ is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at a centre-of-mass energy of 13 TeV between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits on the branching fractions are determined to be B B 0 → K ∗ 0 τ − e + < 5.9 7.1 × 10 − 6 and B B 0 → K ∗ 0 τ + e − < 4.9 5.9 × 10 − 6 at the 90% (95%) confidence level. These results correspond to the current most stringent upper limits for b → sτl transitions.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1007/JHEP11(2025)172
