χc1(2p): an overshadowed charmoniumlike resonance

• Published in: The journal of high energy physics Vol. 2023; no. 2; pp. 216 - 23
• Main Authors: Bruschini, R., González, P.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2023; Springer Nature B.V; SpringerOpen
• Subjects: Classical and Quantum Gravitation; Decay; Elementary Particles; High energy physics; Lattice vibration; Meson-meson interactions; Physics; Physics and Astronomy; Properties of Hadrons; Quantum chromodynamics; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarkonium; Regular Article - Theoretical Physics; Relativity Theory; Resonance; String Theory; Properties of Hadrons; Quarkonium
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP02(2023)216

A bstract A thorough study of the J PC = 1 ++ elastic D 0 D ¯ ∗ 0 and D + D ∗ − scattering, where the form of the meson-meson interaction is inferred from lattice QCD calculations of string breaking, is carried out for center-of-mass energies up to 4 GeV. We show that the presence of χ c 1 (3872), which can be naturally assigned to either a bound or virtual charmoniumlike state close below the D 0 D ¯ ∗ 0 threshold, can overshadow a quasiconventional charmoniumlike resonance lying above threshold. This makes difficult the experimental detection of this resonance through the D 0 D ¯ ∗ 0 and D + D ∗ − channels, despite being its expected main decay modes. We analyze alternative strong and electromagnetic decay modes. Comparison with existing data shows that this resonance may have already been observed through its decay to ωJ / ψ .