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Search for the lepton-flavour-violating decays B0 → K*0τ±e∓

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 o...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Schiller, Manuel (Author) , Schmelling, Michael (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Zavertyaev, Mikhail (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: November 26, 2025
In: Journal of high energy physics
Year: 2025, Issue: 11, Pages: 1-33
ISSN:1029-8479
DOI:10.1007/JHEP11(2025)172
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP11(2025)172
Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP11(2025)172
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Author Notes:The LHCb collaboration
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Summary: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 β(B0 → K*0τ −e+) and β(B0 → K*0τ −e+) < 4.9(5.9) x 10 -6 at the 90% (95%) confidence level. These results correspond to the current most stringent upper limits for b → sτl transitions.
Item Description:Im Titel sind "0", "*", "±" und "∓" jeweils hochgestellt
The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C.E. Cocha Toapaxi, L. Dittmann, S. Esen, F. Glaser, P.A. Günther, X. Han, S. Hausmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M. Schiller, M. Schmelling, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, M. Zavertyaev, Y. Zhao, A. Zhelezov und weitere 1122
Gesehen am 05.05.2026
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP11(2025)172

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