https://doi.org/10.1140/epjc/s10052-024-12993-2
Regular Article - Experimental Physics
Tracking of charged particles with nanosecond lifetimes at LHCb
1
School of Physics and Astronomy, Monash University, Melbourne, Australia
2
Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
3
Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
4
Center for High Energy Physics, Tsinghua University, Beijing, China
5
Institute of High Energy Physics (IHEP), Beijing, China
6
School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
7
University of Chinese Academy of Sciences, Beijing, China
8
Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China
9
Consejo Nacional de Rectores (CONARE), San José, Costa Rica
10
Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France
11
Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France
12
Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France
13
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
14
Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
15
LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France
16
I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
17
Universität Bonn-Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany
18
Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
19
Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
20
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
21
School of Physics, University College Dublin, Dublin, Ireland
22
INFN Sezione di Bari, Bari, Italy
23
INFN Sezione di Bologna, Bologna, Italy
24
INFN Sezione di Ferrara, Ferrara, Italy
25
INFN Sezione di Firenze, Florence, Italy
26
INFN Laboratori Nazionali di Frascati, Frascati, Italy
27
INFN Sezione di Genova, Genoa, Italy
28
INFN Sezione di Milano, Milan, Italy
29
INFN Sezione di Milano-Bicocca, Milan, Italy
30
INFN Sezione di Cagliari, Monserrato, Italy
31
Università degli Studi di Padova, Università e INFN, Padua, PD, Italy
32
INFN Sezione di Perugia, Perugia, Italy
33
INFN Sezione di Pisa, Pisa, Italy
34
INFN Sezione di Roma La Sapienza, Rome, Italy
35
INFN Sezione di Roma Tor Vergata, Rome, Italy
36
Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
37
Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
38
Faculty of Physics and Applied Computer Science, AGH-University of Krakow, Kraków, Poland
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Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
40
National Center for Nuclear Research (NCBJ), Warsaw, Poland
41
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
42
Affiliated with an Institute Covered by a Cooperation Agreement with CERN, Geneva, Switzerland
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DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain
44
ICCUB, Universitat de Barcelona, Barcelona, Spain
45
Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
46
Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
47
European Organization for Nuclear Research (CERN), Geneva, Switzerland
48
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
49
Physik-Institut, Universität Zürich, Zurich, Switzerland
50
NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
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Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
52
University of Birmingham, Birmingham, UK
53
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
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Cavendish Laboratory, University of Cambridge, Cambridge, UK
55
Department of Physics, University of Warwick, Coventry, UK
56
STFC Rutherford Appleton Laboratory, Didcot, UK
57
School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
58
School of Physics and Astronomy, University of Glasgow, Glasgow, UK
59
Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
60
Imperial College London, London, UK
61
Department of Physics and Astronomy, University of Manchester, Manchester, UK
62
Department of Physics, University of Oxford, Oxford, UK
63
Massachusetts Institute of Technology, Cambridge, MA, USA
64
University of Cincinnati, Cincinnati, OH, USA
65
University of Maryland, College Park, MD, USA
66
Los Alamos National Laboratory (LANL), Los Alamos, NM, USA
67
Syracuse University, Syracuse, NY, USA
68
Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
69
School of Physics and Electronics, Hunan University, Changsha, China
70
Guangdong Provincial Key Laboratory of Nuclear Science, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Institute of Quantum Matter, South China Normal University, Guangzhou, China
71
Lanzhou University, Lanzhou, China
72
School of Physics and Technology, Wuhan University, Wuhan, China
73
Departamento de Fisica, Universidad Nacional de Colombia, Bogotá, Colombia
74
Eotvos Lorand University, Budapest, Hungary
75
Van Swinderen Institute, University of Groningen, Groningen, The Netherlands
76
Universiteit Maastricht, Maastricht, The Netherlands
77
Tadeusz Kosciuszko Cracow University of Technology, Kraków, Poland
78
Universidade da Coruña, A Coruña, Spain
79
Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
80
University of Michigan, Ann Arbor, MI, USA
81
Departement de Physique Nucleaire (SPhN), Gif-sur-Yvette, France
82
, Florence, Italy
83
Universidade de Brasília, Brasília, Brazil
84
Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, Brazil
85
Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China
86
School of Physics and Electronics, Henan University, Kaifeng, China
87
LIP6, Sorbonne Universite, Paris, France
88
Excellence Cluster ORIGINS, Munich, Germany
89
Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
90
Università di Bari, Bari, Italy
91
Universita degli studi di Bergamo, Bergamo, Italy
92
Università di Bologna, Bologna, Italy
93
Università di Cagliari, Cagliari, Italy
94
Università di Ferrara, Ferrara, Italy
95
Università di Firenze, Florence, Italy
96
Università di Genova, Genoa, Italy
97
Università degli Studi di Milano, Milan, Italy
98
Università di Milano Bicocca, Milan, Italy
99
Università di Padova, Padua, Italy
100
Università di Perugia, Perugia, Italy
101
Scuola Normale Superiore, Pisa, Italy
102
Università di Pisa, Pisa, Italy
103
Università della Basilicata, Potenza, Italy
104
Università di Roma Tor Vergata, Rome, Italy
105
Università di Siena, Siena, Italy
106
Università di Urbino, Urbino, Italy
107
Universidad de Alcalá, Alcalá de Henares, Spain
108
Facultad de Ciencias Fisicas, Madrid, Spain
109
Department of Physics/Division of Particle Physics, Lund, Sweden
110
CERN, 1211, Geneva 23, Switzerland
Received:
15
March
2024
Accepted:
7
June
2024
Published online:
30
July
2024
A method is presented to reconstruct charged particles with lifetimes between and
which considers a combination of their decay products and the partial tracks created by the initial charged particle. Using the
baryon as a benchmark, the method is demonstrated with simulated events and proton-proton collision data at
corresponding to an integrated luminosity of 2.0
collected with the LHCb detector in 2018. Significant improvements in the angular resolution and the signal purity are obtained. The method is implemented as part of the LHCb Run 3 event trigger in a set of requirements to select detached hyperons. This is the first demonstration of the applicability of this approach at the LHC, and the first to show its scaling with instantaneous luminosity.
A. Gomes: Deceased.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjc/s10052-024-12993-2.
© The Author(s) 2024
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