Year: 2025
Type: article
Abstract: We quantify the effect of high-energy JIMWLK evolution on the deformed structure of heavy (Uranium) and intermediate (Ruthenium) nuclei. The soft gluon emissions in the high-energy evolution are found to drive the initially deformed nuclei towards a more spherical shape, although the evolution is slow, especially for the longest distance-scale quadrupole deformation. We confirm a linear relationship between the squared eccentricity $$\varepsilon _n^2$$ ε n 2 and the deformation parameter $$\beta _n^2$$ β n 2 in central collisions across the energy range covered by the RHIC and LHC measurements. The applied JIMWLK evolution is found to leave visible signatures in the eccentricity evolution that can be observed if the same nuclei can be collided at RHIC and at the LHC, or in rapidity-dependent flow measurements. Our results demonstrate the importance of including the Bjorken- x dependent nuclear geometry when comparing simulations of the Quark Gluon Plasma evolution with precise flow measurements at high collision energies.
Source: The European Physical Journal C
Authors: Heikki Mäntysaari, Pragya Singh
Institutions: University of Helsinki, University of Jyväskylä
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4417530661