Observation of the decay Λ b 0 → ψ(2S)pπ

The Lhcb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The Cabibbo-suppressed decay Λb 0 → ψ(2S)pπ is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ final state. The branching fraction with respect to that of the Λb 0 → ψ(2S)pK decay mode is measured to be ℬ(Λb0→ψ(2S)pπ−)ℬ(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π mass spectra are investigated and no evidence for exotic resonances is found.[Figure not available: see fulltext.].

Original languageEnglish
Article number131
Pages (from-to)1-28
Number of pages28
JournalJournal of High Energy Physics
Volume2018
Issue number8
Early online date21 Aug 2018
DOIs
Publication statusPublished - Aug 2018

Funding

Open Access, Copyright CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3.

FundersFunder number
Not addedST/J004332/1, ST/N000250/1, ST/N000447/1, ST/K003410/1, 1796908, 1708182, ST/N000463/1, ST/N000455/1, ST/L003163/1, ST/N000242/1
AvH Foundation
CNRS/IN2P3
FASO
Herchel Smith Fund
Marie Sklo dowska-Curie Actions
MinES
OCEVU
Yandex LLC
National Science Foundation
School of Energy Resources, University of Wyoming
CERN
College of Arts and Sciences, University of Nebraska-Lincoln
Science and Technology Facilities Council1681016, LHCb, LHCb Upgrades
Leverhulme Trust
Royal Society
English-Speaking Union
European Commission
European Research Council
Deutsche Forschungsgemeinschaft
Agence Nationale de la Recherche
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung166208
National Natural Science Foundation of China
Russian Foundation for Basic Research
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Bundesministerium für Bildung und Forschung
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Generalitat Valenciana
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Ministerstwo Nauki i Szkolnictwa Wyższego
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
National Academy of Sciences of Ukraine
Financiadora de Estudos e Projetos
Russian Science Foundation
Région Auvergne-Rhône-Alpes
Recruitment Program of Global Experts

    Keywords

    • B physics
    • Flavor physics
    • Hadron-Hadron scattering (experiments)
    • Spectroscopy

    Fingerprint

    Dive into the research topics of 'Observation of the decay Λ b 0 → ψ(2S)pπ'. Together they form a unique fingerprint.

    Cite this