2025/06/01 by Paryev, E. Ya.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.2506.00944
In this paper, we investigate the possibility to study the famous charged charmonium-like state Zc(3900) production off nuclear targets and its properties in inclusive photon-induced reactions near the kinematic threshold within the collision model based on the nuclear spectral function. The model accounts for its charged components Zc(3900)± production in direct photon-nucleon interactions as well as three different popular scenarios for their internal structures: compact tetraquarks, molecules of the two open-charm mesons and mixtures of both of them. We calculate the absolute and relative excitation functions for production of Zc(3900)± mesons on 12C and 184W target nuclei at initial photon energies of 9.0-17.5 GeV, the absolute momentum differential cross sections and their ratios for the Zc(3900)± production off these target nuclei at laboratory polar angles of 0∘-10∘ and at photon energy of 14 GeV as well as the A-dependences of the ratios of the total cross sections for Zc(3900)± production at photon energy of 14 GeV within the adopted scenarios for the Zc(3900)± internal structures. We demonstrate that the absolute and relative observables considered show a certain sensitivity to the Zc(3900)± internal structures which are by far the best known. Hence, they might be useful for the determination of these structures -- the issue which has attracted much attention in the hadron physics community -- from the comparison of them with the experimental data from the future high-precision experiments at the CEBAF facility.