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Test of lepton flavor universality with B0s โ†’ ๐œ™โ„“+โขโ„“โˆ’ decays

Lepton flavor universality in rare ๐‘ โ†’๐‘  transitions is tested for the first time using ๐ต0๐‘  meson decays. The measurements are performed using ๐‘โข๐‘ collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fbโˆ’1. Branching fraction ratios...

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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) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Guฬˆnther, Paulโ€‰Andreฬ (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascoฬn, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Joฬˆrg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Schiller, Manuel (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 27 March, 2025
In: Physical review letters
Year: 2025, Volume: 134, Issue: 12, Pages: 1-15
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.121803
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.134.121803
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.121803
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Author Notes:R. Aaij et al.* (LHCb Collaboration)
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Summary:Lepton flavor universality in rare ๐‘ โ†’๐‘  transitions is tested for the first time using ๐ต0๐‘  meson decays. The measurements are performed using ๐‘โข๐‘ collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fbโˆ’1. Branching fraction ratios between the ๐ต0๐‘ โ†’๐œ™โข๐‘’+โข๐‘’โˆ’ and ๐ต0๐‘  โ†’๐œ™โข๐œ‡+โข๐œ‡โˆ’ decays are measured in three regions of dilepton mass squared, ๐‘ž2, with 0.1<๐‘ž2<1.1, 1.1 <๐‘ž2 <6.0, and 15<๐‘ž2<19 GeV2/๐‘4. The results agree with the standard model expectation of lepton flavor universality.
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LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Guฬˆnther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascoฬn, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und viele weitere]
Gesehen am 07.01.2026
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.121803

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