Document Type

Article

Publication Date

2024

DOI

10.1103/PhysRevD.110.074016

Publication Title

Physical Review D

Volume

110

Issue

7

Pages

074016 (1-33)

Abstract

We present a first practical implementation of a recently proposed hadron structure oriented (HSO) approach to transverse momentum dependent (TMD) phenomenology applied to Drell-Yan-like processes, including lepton pair production at moderate Q² and Z⁰ boson production. We compare and contrast general features of our methodology with other common practices and emphasize aspects that we view as improvements. Separately, we discuss the importance of treatments that preserve various theoretical properties of the nonperturbative parts of TMD parametrizations for future applications that have the extraction of hadron structure as a primary goal. These include the HSO’s preservation of a basic TMD parton-model-like framework even while accounting for full TMD factorization and evolution, explicit preservation of the integral relationship between TMD and collinear parton density functions, and the ability to meaningfully compare different theoretical models of nonperturbative TMD parton distributions. In our examples, we show that there is significant sensitivity at moderate Q² to both the form of the nonperturbative transverse momentum dependence and the parametrization of collinear parton densities. However, we also find that evolving to Q² = M²z, without fitting, results in a satisfactory postdiction of existing data for Z⁰ production, nearly independently of the modeling of nonperturbative transverse momentum behavior. We argue that this demonstrates that moderate Q measurements should be given greater weight than high Q measurements in extractions of nonperturbative transverse momentum dependence. We also obtain new extractions of the nonperturbative Collins-Soper kernel within the HSO approach. We discuss its features and compare with some earlier extractions.

Rights

© 2024 The Authors.

Published under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Original Publication Citation

Aslan, F., Boglione, M., Gonzalez-Hernandez, J. O., Rainaldi, T., Rogers, T. C., & Simonelli, A. (2024). Phenomenology of TMD parton distributions in Drell-Yan and Z⁰ boson production in a hadron structure oriented approach. Physical Review D, 110(7), 1-33, Article 074016. https://doi.org/10.1103/PhysRevD.110.074016

ORCID

0000-0002-8342-6765 (Rainaldi), 0000-0002-0762-0275 (Rogers), 0000-0003-2607-9004 (Simonelli)

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