An alternative way to decipher the nature of the doubly charmed tetraquark : its antiparticle photoproduction off nuclei near threshold
arXiv:2408.00360 · doi:10.1142/S0217751X2450115X
Abstract
We study the inclusive photoproduction of mesons (which are the antiparticles of the doubly charmed tetraquarks discovered recently by the LHCb Collaboration) from nuclei in the near-threshold energy region within the nuclear spectral function approach by considering incoherent direct () photon--nucleon creation processes as well as five possible different scenarios for their internal structure with the main goal of clarifying the possibility to decipher this structure (and, hence, that of ) in photoproduction via integral and differential observables. We calculate the absolute and relative excitation functions for production off C and W target nuclei at near-threshold photon beam energies of 30--38 GeV, the absolute differential cross sections for their production off these target nuclei at laboratory polar angles of 0--10 as well as the A and momentum dependences of the relative (transparency ratios) cross sections for production at photon energy of 35 GeV within the adopted scenarios for the meson intrinsic structure. We demonstrate that the absolute and relative observables considered show a certain sensitivity to these scenarios. Therefore, the measurement of such observables in future experiments at the proposed high-luminosity electron-ion colliders EIC and EicC in the US and China in the near-threshold energy region might shed light on the internal structure.
23 pages, 10 figures. arXiv admin note: substantial text overlap with arXiv:2405.01089
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