Center-of-mass energy dependence of intrinsic- distributions obtained from Drell-Yan production
arXiv:2404.04088 · doi:10.1140/epjc/s10052-025-14021-3
Abstract
The internal motion of partons inside hadrons has been studied through its impact on very low transverse momentum spectra of Drell-Yan (DY) pairs created in hadron-hadron collisions. We study DY production at next-to-leading order using the Parton Branching (PB) method which describes the evolution of transverse momentum dependent parton distributions. The main focus is on studying the intrinsic transverse momentum distribution (intrinsic-) as a function of the center-of-mass energy . While collinear parton shower Monte Carlo event generators require intrinsic transverse momentum distributions strongly dependent on , this is not the case for the PB method. We perform a detailed study of the impact of soft parton emissions. We show that by requiring a minimal transverse momentum, , of a radiated parton, a dependence of the width of the intrinsic- distribution as a function of is observed. This dependence becomes stronger with increasing .
arXiv commentUpdated with published version in EPJC, 85(3), 278
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