Tracking of charged particles with nanosecond lifetimes at LHCb

LHCb Collaboration [email protected]

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

A method is presented to reconstruct charged particles with lifetimes between 10ps and 10ns, which considers a combination of their decay products and the partial tracks created by the initial charged particle. Using the Ξ- baryon as a benchmark, the method is demonstrated with simulated events and proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 2.0fb-1 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.

Original languageEnglish
Article number761
Pages (from-to)1-16
Number of pages16
JournalEuropean Physical Journal C
Volume84
Issue number7
Early online date30 Jul 2024
DOIs
Publication statusPublished - Jul 2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

Funding

FundersFunder number
Agence Nationale de la Recherche
Australian Research Data Commons
National Academy of Sciences of Ukraine
Narodowe Centrum Nauki
National Science Foundation
Institut national de physique nucléaire et de physique des particules
Science and Technology Facilities Council
H2020 Marie Skłodowska-Curie Actions
Automotive Research Center
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Ciencia e Innovación
Ministry of Science and Technology, Taiwan
Program of Guangzhou
Instituto Nazionale di Fisica Nucleare
Financiadora de Estudos e Projetos
Catholic Archdiocese of Sydney
Centre National de la Recherche Scientifique
Bundesministerium für Bildung und Forschung
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Deutsche Forschungsgemeinschaft
Région Auvergne-Rhône-Alpes
International Council of Shopping Centers
CAS CCEPP
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
NextGenerationEU
Key Research Program of Frontier Sciences of CAS
Sociedad Española de Reumatología
European Research Council
EPLANET
Ministerstwo Edukacji i Nauki
Generalitat Valenciana
CERN
Nuclear Physics
Fundamental Research Funds for the Central Universities
Alexander von Humboldt-Stiftung
National Natural Science Foundation of China

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