2019/08/31 by Timothy J. Burns, T. J. Burns, Eric S. Swanson +1 · 100 citations
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced NMR Techniques and Applications #Computer science #Interpretation (philosophy) #Programming language #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.100.114033
published in Physical review. D/Physical review. D. 100(11) (American Physical Society) · 15 pages, 6 figures. Some new material in the conclusions, and a typo corrected in Table II
openalex created_date 2019/08/22 · arxiv created 2019/11/11 · openalex publication_date 2019/12/20 · arxiv updated 2019/12/25 · openalex updated_date 2026/08/05
A molecular model of the Pc(4457) and Pc(4440) LHCb states is proposed. The model relies on channels coupled by long-range pion-exchange dynamics with features that depend crucially on the novel addition of the \mathrm\ensuremathΛc(2595)D channel. A striking prediction of the model is the unusual combination of quantum numbers JP(4457)=1/2+ and JP(4440)=3/2^\ensuremath-. Unlike in other models, a simultaneous description of both states is achieved without introducing additional short-range interactions. The model also gives a natural explanation for the relative widths of the states. We show that the usual molecular scenarios cannot explain the production rate of Pc states in \mathrm\ensuremathΛb decays and that this can be resolved by including \mathrm\ensuremathΛc(2595)D and related channels. Experimental tests and other states are discussed in the conclusions.