2023/06/22 by Chunjiang Shi, Ying Chen, Shi, Chunjiang +9
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2306.12884
openalex publication_date 2023/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
By extracting the transition amplitudes, we give the first lattice QCD prediction of the two-body decay partial widths of the 1-+ charmoniumlike hybrid ηc1. Given the calculated mass value m_ηc1=4.329(36) GeV, the ηc1 decay is dominated by the open charm modes D1D, D^*D and D^*D^* with partial widths of 258(133) MeV, 88(18) MeV and 150(118) MeV, respectively. The coupling of ηc1 to χc1 plus a flavor singlet pseudoscalar is not small, but χc1η decay is suppressed by the small η-η' mixing angle. The partial width of ηc1→ ηcη' is estimated to be around 1 MeV. We suggest experiments to search for ηc1 in the P-wave D^*D and D^*D^* systems. Especially, the polarization of D^*D^* can be used to distinguish the 1-+ product (total spin S=1) from 1-- products (S=0).