Absorption of 1$P$-wave heavy charmonium ${\chi }_{c1}(1P)$ in nuclei

Abstract

We study the inclusive heavy charmonium ${\chi }_{c1}(1P)$ photoproduction from nuclei near the kinematic threshold within the collision model, based on the nuclear spectral function, for incoherent direct photon--nucleon charmonium creation processes. The model accounts for the final ${\chi }_{c1}(1P)$ absorption in nuclear medium, target nucleon binding and Fermi motion. We calculate the absolute and relative excitation functions on ${}^{12}$C and ${}^{184}$W target nuclei at near-threshold photon beam energies of 8.25--16.0 GeV, the absolute momentum differential cross sections and ratios of them for its production off these target nuclei at laboratory polar angles of 0${}^{\circ }$--10${}^{\circ }$ and for photon energy of 13 GeV as well as the A-dependences of the transparency ratios for the ${\chi }_{c1}(1P)$ at photon energy of 13 GeV within the different scenarios for its absorption cross section in nuclei. We demonstrate that the absolute and relative observables considered reveal distinct sensitivity to these scenarios. Therefore, they might be useful for the determination of this cross section from the comparison of them with the experimental data from the future experiments at the upgraded up to 22 GeV CEBAF facility, which is of crucial importance in understanding of charmonium production and suppression in high-energy heavy--ion collisions in a search for the quark-gluon plasma.

23 pages, 10 figures

References in corpus (19)

• Quarkonium Binding and Dissociation: The Spectral Analysis of the QGP
• Prompt and nonprompt J/$\psi$ production and nuclear modification in $p$Pb collisions at $\sqrt{s_{\text{NN}}}=8.16$ TeV
• Measurement of the ratio of prompt ${\chi }_c$ to $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• Critical behavior of charmonia across the phase transition: A QCD sum rule approach
• Measurement of the relative prompt production rate of chi(c2) and chi(c1) in pp collisions at sqrt(s) = 7 TeV
• An experimental review of open heavy flavor and quarkonium production at RHIC
• Measurement of chi_c1 and chi_c2 production with sqrt(s) = 7 TeV pp collisions at ATLAS
• Production of the Charmonium States chic_1 and chic_2 in Proton Nucleus Interactions at sqrt{s} = 41.6 GeV
• XYZ spectroscopy at electron-hadron facilities: Exclusive processes
• Exclusive photoproduction of excited quarkonia in ultraperipheral collisions
• Photon-Odderon interference in exclusive ${\chi }_c$ charmonium production at the Electron-Ion Collider
• Probing the hidden-bottom pentaquark resonances in photonuclear bottomonium production near threshold: differential observables
• The possibility to study in-medium modification of $J/\psi$ mesons from their photoproduction on nuclei near threshold in the case of presence of the LHCb pentaquark states $P_c^{+}$ in this photoproduction
• First Measurement of Near- and Sub-Threshold $J/\psi$ Photoproduction off Nuclei
• Probing the structure of $X(3872)$ in photoproduction
• Measurements of $\psi (2S)$ and ${\chi }_{c1}(3872)$ production within fully reconstructed jets
• XYZ spectroscopy at electron-hadron facilities III: Semi-inclusive processes with vector exchanges
• Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure
• Absorption of $\psi (2S)$ mesons in nuclei