Observation of a Narrow Pentaquark State, , and of the Two-Peak Structure of the
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Open Access
- 5 June 2019
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 122 (22), 222001
- https://doi.org/10.1103/physrevlett.122.222001
Abstract
A narrow pentaquark state, , decaying to , is discovered with a statistical significance of in a data sample of decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, and , where the statistical significance of this two-peak interpretation is . The proximity of the and thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.
Keywords
Funding Information
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Financiadora de Estudos e Projetos
- Ministry of Science and Technology of the People’s Republic of China
- National Natural Science Foundation of China
- Centre National de la Recherche Scientifique
- Bundesministerium für Bildung und Forschung
- Deutsche Forschungsgemeinschaft
- Max-Planck-Gesellschaft
- Instituto Nazionale di Fisica Nucleare
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Ministerstwo Nauki i Szkolnictwa Wyższego
- Narodowe Centrum Nauki
- Ministerul Educatiei si Cercetarii Stiintifice
- Ministry of Education and Science of the Russian Federation
- Ministerio de Economía y Competitividad
- Swiss National Science Foundation
- State Secretariat for Education, Research and Innovation
- National Academy of Sciences of Ukraine
- Science and Technology Facilities Council
- National Science Foundation
- Karlsruher Institut für Technologie
- Deutsches Elektronen-Synchrotron
- Alexander von Humboldt-Stiftung
- H2020 Marie Sklodowska-Curie Actions
- H2020 European Research Council
- Agence Nationale de la Recherche
- Russian Foundation for Basic Research
- Russian Science Foundation
- Chinese Academy of Sciences
- Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia
- Generalitat de Catalunya
- Royal Society
- Leverhulme Trust
- Institut National de Physique Nucleaire et de Physique des Particules (CNRS/IN2P3)
- Institul de Fizica Atomica (MEN/IFA)
- SURF, Collaborative organisation for ICT in Dutch higher education and research
- PIC, Port d’Informacio Cientifica
- GridPP, UK Computing for Particle Physics
- National Research Center “Kurchatov” Institute
- Yandex LLC
- CSCS
- IFIN-HH
- CBPF
- PL-GRID
- Ohio Supercomputer Center (OSC)
- EPLANET, The European Particle physics Latin America NETwork
- Labex P2IO, Physique des 2 Infinis et des Origines
- Labex OCEVU, Origine Constituants et Evolution de l’Univers
- Région Auvergne-Rhone-Alpes
- CAS President’s International Fellowship Initiative
- Thousand Talents Program
- Generalitat Valenciana, the regional government of Valencia, in Spain
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