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First observation of Λb0 → ςc (∗)++ D (∗)-K- decays

  • (LHCb Collaboration)

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The four decays, Λb0→ςc(∗)++D(∗)-K-, are observed for the first time using proton-proton collision data collected with the LHCb detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb-1. By considering the Λb0→Λc+D¯0K- decay as reference channel, the following branching fraction ratios are measured to be B(Λb0→ςc++D-K-)B(Λb0→Λc+D¯0K-)=0.282±0.016±0.016±0.005, B(Λb0→ςc∗++D-K-)B(Λb0→ςc++D-K-)=0.460±0.052±0.028, B(Λb0→ςc++D∗-K-)B(Λb0→ςc++D-K-)=2.261±0.202±0.129±0.046, B(Λb0→ςc∗++D∗-K-)B(Λb0→ςc++D-K-)=0.896±0.137±0.066±0.018, where the first uncertainties are statistical, the second are systematic, and the third are due to uncertainties in the branching fractions of intermediate particle decays. These initial observations mark the beginning of pentaquark searches in these modes, with more datasets to become available following the LHCb upgrade.

Original languageEnglish
Article numberL031104
Pages (from-to)1-13
Number of pages13
JournalPhysical Review D
Volume110
Issue number3
DOIs
Publication statusPublished - 1 Aug 2024

Bibliographical note

LHCb Collaboration

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Publisher Copyright:
© 2024 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Funding

FundersFunder number
Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei'
Agence Nationale de la Recherche
Australian Research Council
Australian Research Data Commons
Stockholm Resilience Centre, Stockholm University
National Academy of Sciences of Ukraine
Narodowe Centrum Nauki
National Science Foundation
Institut national de physique nucléaire et de physique des particules
H2020 Marie Skłodowska-Curie Actions
Automotive Research Center
HORIZON EUROPE Marie Sklodowska-Curie Actions
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
Leverhulme Trust
SURF
Instituto Nazionale di Fisica Nucleare
Financiadora de Estudos e Projetos
Region Auvergne-Rhene-Alpes
Polish WLCG
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
Karlsruhe Institute of Technology
Deutsche Forschungsgemeinschaft
Région Auvergne-Rhône-Alpes
International Council of Shopping Centers
CAS CCEPP
GridPP
Deutsches Elektronen-Synchrotron
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
NextGenerationEU
Key Research Program of Frontier Sciences of CAS
Royal Society
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
UK Research and Innovation
National Natural Science Foundation of China
Science and Technology Facilities CouncilST/N000269/1
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