Inclusive B-meson flavour-tagging algorithm at LHCb

The LHCb collaboration

doi:10.1007/JHEP11(2025)041

Inclusive B-meson flavour-tagging algorithm at LHCb

The LHCb collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

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 Bs0 mesons using B⁰ → J/ψK⁺π⁻ and Bs0→Ds−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 Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.

Original language	English
Article number	41
Journal	Journal of High Energy Physics
Volume	2025
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2025)041
Publication status	Published - 1 Nov 2025

Keywords

B Physics
CP Violation
Flavour Physics
Hadron-Hadron Scattering

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10.1007/JHEP11(2025)041

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@article{68ee98e98578400bb341a620b1acc274,

title = "Inclusive B-meson flavour-tagging algorithm at LHCb",

abstract = "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 Bs0 mesons using B0 → J/ψK+π− and Bs0→Ds−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 Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.",

keywords = "B Physics, CP Violation, Flavour Physics, Hadron-Hadron Scattering",

author = "\{The LHCb collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and R. Aleksiejunas and F. Alessio and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and P. Andreola and M. Andreotti and \{Andres Estrada\}, S. and A. Anelli and D. Ao and F. Archilli and Z. Areg and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and \{Ata{\'i}de Da Silva\}, R. and M. Atzeni and B. Audurier and Authier, \{J. A.\} and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and V. Balagura and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2025.",

year = "2025",

month = nov,

day = "1",

doi = "10.1007/JHEP11(2025)041",

language = "English",

volume = "2025",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

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T1 - Inclusive B-meson flavour-tagging algorithm at LHCb

AU - The LHCb collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Aleksiejunas, R.

AU - Alessio, F.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andres Estrada, S.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Areg, Z.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataíde Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Authier, J. A.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Balagura, V.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2025/11/1

Y1 - 2025/11/1

N2 - 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 Bs0 mesons using B0 → J/ψK+π− and Bs0→Ds−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 Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.

AB - 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 Bs0 mesons using B0 → J/ψK+π− and Bs0→Ds−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 Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.

KW - B Physics

KW - CP Violation

KW - Flavour Physics

KW - Hadron-Hadron Scattering

UR - https://www.scopus.com/pages/publications/105022274842

U2 - 10.1007/JHEP11(2025)041

DO - 10.1007/JHEP11(2025)041

M3 - Article

AN - SCOPUS:105022274842

SN - 1126-6708

VL - 2025

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 41

ER -

Inclusive B-meson flavour-tagging algorithm at LHCb

Abstract

Keywords

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