Study of the doubly charmed tetraquark [Formula: see text].

ABSTRACT: Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D⁰D⁰π⁺ mass spectrum just below the D^*+D⁰ mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar [Formula: see text] tetraquark with a quark content of [Formula: see text] and spin-parity quantum numbers J^P = 1⁺. S

SUBMITTER: LHCb collaboration 

PROVIDER: S-EPMC9203551 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature