Observation of an exotic narrow doubly charmed tetraquark

LHCb collaboration

Research output: Contribution to journalArticleAcademicpeer-review

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 (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) 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.
Original languageEnglish
Pages (from-to)751-754
Number of pages11
JournalNature Physics
Volume18
Issue number7
Early online date1 Jun 2022
DOIs
Publication statusPublished - Jul 2022

Keywords

  • MULTIQUARK HADRONS
  • STATES
  • BARYONS
  • MODEL

Cite this