2025/01/27 by Pietro Colangelo, Colangelo, Pietro, Fulvia De Fazio +3
Physics and Astronomy · #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2501.15888
More than twenty years have elapsed since the discovery of χc1(3872) (previously denoted as X(3872)), and an impressive amount of theoretical and experimental studies has been devoted to its properties, decays and production mechanisms. Despite the extensive work, a full understanding of the nature of χc1(3872) is still missing. In the present study we reconsider a theoretical framework based on the heavy quark large mass limit to analyse the radiative decays of heavy quarkonia, in particular the electric dipole transitions of χc1(2P) to S-wave charmonia. The results favourably compare to recent measurements for χc1(3872), obtained by the LHCb Collaboration, if this meson is identified with χc1(2P).