Observation of an exotic narrow doubly charmed tetraquark
National Institute for Subatomic Physics · University of Warwick · +94 more institutions
Abstract
Abstract Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark–antiquark pair, respectively 1,2 . Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a $$\overline{{{{{u}}}}}$$ u ¯ and a $$\overline{{{{{d}}}}}$$ d ¯ quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of D 0 D 0 π + mesons just below the D *+ D 0 mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.
Citation impact
- FWCI
- 44.13
- Percentile
- 100%
- References
- 113
Authors
1005Topics & keywords
- Physics
- Hadron
- Particle physics
- Meson
- Quark
- Charm (quantum number)
- Baryon
- Exotic hadron
Funding
- NSNational Science FoundationAward: CNRS/IN2P3
- UDU.S. Department of Energy
- AVAlexander von Humboldt-Stiftung
- CCERN
- URUK Research and Innovation
- NENational Energy Research Scientific Computing Center
- INInstitutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei'
- LTLeverhulme Trust
- RSRoyal Society
- ECEuropean Commission
- DFDeutsche Forschungsgemeinschaft
- ANAgence Nationale de la Recherche
- SNSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- NNNational Natural Science Foundation of ChinaAward: IN2P3
- RFRussian Foundation for Basic Research
- CDCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
- BFBundesministerium für Bildung und Forschung
- NONederlandse Organisatie voor Wetenschappelijk Onderzoek
- GVGeneralitat Valenciana
- CNConselho Nacional de Desenvolvimento Científico e Tecnológico
- MMax-Planck-Gesellschaft
- MEMinisterstwo Edukacji i Nauki
- FCFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- NANational Academy of Sciences of Ukraine
- CNCentre National de la Recherche ScientifiqueAward: CNRS/IN2P3
- FDFinanciadora de Estudos e Projetos
- MDMinisterio de Ciencia e Innovación
- RSRussian Science Foundation
- RARégion Auvergne-Rhône-Alpes
- CCCAS Center for Excellence in Particle Physics
- ARAustralian Research Data Commons
- SAScience and Technology Facilities CouncilAward: IN2P3
- DEDeutsches Elektronen-Synchrotron
- FRFundamental Research Funds for the Central Universities
- INInstitut National de Physique Nucléaire et de Physique des ParticulesAward: CNRS/IN2P3
- NPNuclear Physics
- HMH2020 Marie Skłodowska-Curie Actions