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Inclusive B-meson flavour-tagging algorithm at LHCb

A new algorithm is developed to identify the flavour of neutral B mesons at production in pp collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for B0 and B s 0 mesons using B0 → J/ψK+π− and B s 0 → D s - π+ decays from pp collision data collect...

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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) , Wolf, Tom (Author) , Zavertyaev, Mikhail (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: November 10, 2025
In: Journal of high energy physics
Year: 2025, Issue: 11, Pages: 1-31
ISSN:1029-8479
DOI:10.1007/JHEP11(2025)041
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP11(2025)041
Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP11(2025)041
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Author Notes:the LHCb collaboration
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Summary:A new algorithm is developed to identify the flavour of neutral B mesons at production in pp collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for B0 and B s 0 mesons using B0 → J/ψK+π− and B s 0 → D s - π+ decays from pp collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV. This new algorithm improves the tagging power by 35% for B0 mesons and 20% for B s 0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.
Item Description: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.T. Schiller, M. Schmelling, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, T. Wolf, M. Zavertyaev, Y. Zhao, A. Zhelezov und weitere 1171
Gesehen am 08.04.2026
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP11(2025)041

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