Year: 2024
Type: article
Abstract: A bstract The assumption of factorization lies at the core of calculations of medium effects on observables computable in perturbative Quantum Chromodynamics. In this work we examine this assumption, for which we propose a setup to study hard processes and bulk nuclear matter in heavy-ion collisions on the same footing using the Glauber modelling of heavy nuclei. To exemplify this approach, we calculate the leading-order corrections to azimuthal decorrelation in Drell-Yan and boson-jet processes due to cold nuclear matter effects, not considering radiation. At leading order in both the hard momentum scale and the nuclear size, the impact-parameter dependent cross section is found to factorize for both processes. The factorization formula involves a convolution of the hard cross section with the medium-modified parton distributions, and, for boson-jet production, the medium-modified jet function.
Source: Journal of High Energy Physics
Authors: Néstor Armesto, Florian Cougoulic, Bin Wu
Institution: Universidade de Santiago de Compostela
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1086978037, G1218400627, G1496055848, G1622782223, G1840991089, G1869016439, G2262748287, G2538972755, G2928245867, The strong interaction at the frontier of knowledge: fundamental research and applications, G3480869486, G3681454997, G3694284866, G4042783231, G425668148, G434337789, G451917667, G4912030886, G5717897370, G5967599077, G632107855, G692825579, G7084143925, G7567520714, G760503546, Heavy ion collisions: collectivity and precision in saturation physics
OpenAlex ID: W4404329792