Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ωc0 Baryon

(LHCb Collaboration)

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The first observation of the singly Cabibbo-suppressed ωc0→ω-K+ and ωc0→Ξ-π+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(ωc0→ω-K+)B(ωc0→ω-π+)=[6.08±0.51(stat)±0.40(syst)]%,B(ωc0→Ξ-π+)B(ωc0→ω-π+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the ωc0→ω-π+ decay channel, the ωc0 baryon mass is measured to be M(ωc0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.

Original languageEnglish
Article number081802
Pages (from-to)1-11
Number of pages11
JournalPhysical review letters
Volume132
Issue number8
Early online date23 Feb 2024
DOIs
Publication statusPublished - 23 Feb 2024

Bibliographical note

Publisher Copyright:
© 2024 CERN.

Funding

We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland), and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracción Talento, CM (Spain); SRC (Sweden); and the Leverhulme Trust, the Royal Society, and UKRI (United Kingdom).

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

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