Work

Hadronic decay of exotic mesons consisting of four charm quarks

Year: 2024

Type: article

Abstract: In 2020, a di- J / ψ resonance centered at around 6.9 GeV was discovered by the LHCb Collaboration and was later confirmed by the ATLAS and CMS Collaborations. In addition to the 6.9-GeV resonance, its low-energy counterpart centered at around 6552 MeV was also observed by the CMS Collaboration. They are generally considered as fully charm tetraquarks. In this paper, we calculate the inclusive decay width of molecules composed of two J / ψ ’s and genuine fully charm tetraquarks into light hadrons and into open charms, respectively. Assuming them as S -wave states, we consider all possible spin configurations, namely, spin-0 and spin-2, that decay exclusively into double J / ψ , and find that the ratio ( R ) of the decay width for the light-hadron final states to that for the charmed final states differs significantly among different spin configurations, which can help to explore the nature of the observed di- J / ψ resonances. Published by the American Physical Society 2024

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.096021

Authors: Hong-Fei Zhang, Xue-Mei Mo, Yu-Peng Yan

Institutions: Guizhou University of Finance and Economics, Suranaree University of Technology

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Guizhou Science and Technology Department, Office of the Higher Education Commission

Awards: G210340378, G4671806747, G8238195731