Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

ATLAS Collaboration

doi:10.1140/epjc/s10052-025-14232-8

Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

ATLAS Collaboration

iThemba Laboratory for Accelerator Based Sciences
Department of Physics
University of South Africa
University of Zululand
Cadi Ayyad University
Departamento de Física Teórica y del Cosmos
University of Granada
CERN
Columbia University
Demokritos National Centre for Scientific Research
Department of Physics and Astronomy
University of Sheffield
Laboratory for Particle Physics and Cosmology
Harvard University
Dipartimento di Fisica e Astronomia A. Righi
University of Bologna
National Institute for Nuclear Physics
University of Belgrade
Department Physik
University of Siegen
Heidelberg University
Department of Physics
Indiana University Bloomington
CAS - Institute of High Energy Physics
University of Science and Technology of China
School of Physics and Astronomy
Shanghai Jiao Tong University
Department of Physics
University of Michigan, Ann Arbor
Shandong University
University of Arizona
Nanjing University
Tsinghua University
University of Illinois
SLAC National Accelerator Laboratory
University of California at Santa Cruz
University of Washington
Université Paris-Saclay
Physics Division
Lawrence Berkeley National Laboratory
Department of Physics and Astronomy
University College London
International Center for Elementary Particle Physics and Department of Physics
The University of Tokyo
CNRS
University of Wisconsin
University of the Witwatersrand

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

2 Citations (Scopus)

Abstract

A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is (Formula presented.) The average decay width extracted from the effective lifetime, using parameters from external sources, is (Formula presented.) where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of (Formula presented.) The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.

Original language	English
Article number	736
Journal	European Physical Journal C
Volume	85
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-025-14232-8
Publication status	Published - Jul 2025

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-025-14232-8

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@article{b998f174784941299ac82e4f82518270,

title = "Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector",

abstract = "A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton{\textendash}proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is (Formula presented.) The average decay width extracted from the effective lifetime, using parameters from external sources, is (Formula presented.) where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of (Formula presented.) The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.",

author = "ATLAS Collaboration and L. Zwalinski and W. Zou and O. Zormpa and Zorbas, \{T. G.\} and K. Zoch and A. Zoccoli and L. {\v Z}ivkovi{\'c} and M. Ziolkowski and J. Zinsser and Zimine, \{N. I.\} and K. Zhukov and X. Zhuang and Y. Zhu and Y. Zhu and X. Zhu and J. Zhu and Zhu, \{C. G.\} and Y. Zhou and Y. Zhou and Y. Zhou and N. Zhou and H. Zhou and B. Zhou and D. Zhong and Z. Zheng and X. Zheng and K. Zheng and J. Zheng and A. Zhemchugov and Z. Zhao and Z. Zhao and Y. Zhao and T. Zhao and H. Zhao and Z. Zhang and Z. Zhang and Z. Zhang and Y. Zhang and Y. Zhang and Y. Zhang and X. Zhang and X. Zhang and T. Zhang and S. Zhang and S. Zhang and R. Zhang and L. Truong and N. Govender and Gololo, \{M. G.D.\} and Connell, \{S. H.\}",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ATLAS Collaboration 2025.",

year = "2025",

month = jul,

doi = "10.1140/epjc/s10052-025-14232-8",

language = "English",

volume = "85",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "7",

}

TY - JOUR

T1 - Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

AU - ATLAS Collaboration

AU - Zwalinski, L.

AU - Zou, W.

AU - Zormpa, O.

AU - Zorbas, T. G.

AU - Zoch, K.

AU - Zoccoli, A.

AU - Živković, L.

AU - Ziolkowski, M.

AU - Zinsser, J.

AU - Zimine, N. I.

AU - Zhukov, K.

AU - Zhuang, X.

AU - Zhu, Y.

AU - Zhu, X.

AU - Zhu, J.

AU - Zhu, C. G.

AU - Zhou, Y.

AU - Zhou, N.

AU - Zhou, H.

AU - Zhou, B.

AU - Zhong, D.

AU - Zheng, Z.

AU - Zheng, X.

AU - Zheng, K.

AU - Zheng, J.

AU - Zhemchugov, A.

AU - Zhao, Z.

AU - Zhao, Y.

AU - Zhao, T.

AU - Zhao, H.

AU - Zhang, Z.

AU - Zhang, Y.

AU - Zhang, X.

AU - Zhang, T.

AU - Zhang, S.

AU - Zhang, R.

AU - Truong, L.

AU - Govender, N.

AU - Gololo, M. G.D.

AU - Connell, S. H.

PY - 2025/7

Y1 - 2025/7

N2 - A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is (Formula presented.) The average decay width extracted from the effective lifetime, using parameters from external sources, is (Formula presented.) where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of (Formula presented.) The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.

AB - A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is (Formula presented.) The average decay width extracted from the effective lifetime, using parameters from external sources, is (Formula presented.) where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of (Formula presented.) The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.

UR - https://www.scopus.com/pages/publications/105012447680

U2 - 10.1140/epjc/s10052-025-14232-8

DO - 10.1140/epjc/s10052-025-14232-8

M3 - Article

AN - SCOPUS:105012447680

SN - 1434-6044

VL - 85

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 736

ER -

Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

Abstract

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