Nuclear deformation effects in photoproduction of ρ mesons in ultraperipheral isobaric collisions
Year: 2025
Type: article
Abstract: We investigate the photoproduction of neutral ρ mesons in ultraperipheral isobaric collisions of Ru 44 96 + Ru 44 96 and Zr 40 96 + Zr 40 96 at s N N 1 / 2 = 200 GeV , employing the dipole model within the equivalent photon approximation. By implementing the Woods-Saxon distribution for the nuclear mass density, which is derived from the density functional theory incorporating nuclear deformation effects, we calculate differential cross sections in Ru + Ru and Zr + Zr collisions as well as their ratios in the transverse momentum spectrum squared q T 2 . We observe the characteristic dip behavior in differential cross sections, an indicator of diffraction in high-energy collisions. When nuclear deformation is considered, the ratio of differential cross sections shows a nearly linear increase behavior with increasing q T 2 for q T 2 ≲ 0.015 GeV 2 , in agreement with experimental observation. We offer a simple explanation for such a behavior by introducing an effective description of the thickness function. We also extend our discussion on the photoproduction of neutral ρ mesons in electron-ion collisions with nuclear targets Cu-63, Au-197 and U-238.
Authors: Shuo Lin, Jin-Yu Hu, Hao-Jie Xu, Shi Pu, Qun Wang
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4409415442