A p_T-ratio observable for studies of intrinsic transverse momentum of partons from Drell-Yan p_T spectra

2025/05/11 by W. Zhan, Siqi Yang, Zhan, Wenxiao +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2505.06973

openalex publication_date 2025/05/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The determination of the intrinsic transverse momentum distribution of partons is central both for applications of parton shower Monte Carlo generators and for QCD studies of transverse momentum dependent (TMD) parton densities. Valuable information on this distribution is provided by experimental measurements of Drell-Yan transverse momentum p_T, in the region of low transverse momenta, with fine binning in p_T. However, such fine-binning measurements are challenging, as they require an extremely delicate control of systematic uncertainties. We suggest a p_T observable based on measuring ratios between cross sections of suitably defined low-p_T and high-p_T regions. This observable does not rely on any dedicated partition of bins and has lower systematic uncertainties, and is shown to provide a good sensitivity to the intrinsic transverse momentum.

Related

• Intrinsic k_T and soft gluons in Monte Carlo event generators
• NLO Analysis of Small-k_T Region in Drell-Yan Production with Parton Branching
• The transverse momentum spectrum of low mass Drell-Yan production at next-to-leading order in the parton branching method
• Drell-Yan transverse spectra at the LHC: a comparison of parton branching and analytical resummation approaches
• Extraction of partonic transverse momentum distributions from semi-inclusive deep inelastic scattering and Drell-Yan data