Nuclear Modification of Transverse Momentum Dependent Parton Distribution Functions by a Global QCD Analysis

Mishary Alrashed; Daniele Anderle; Zhong-Bo Kang; John Terry; Hongxi Xing

doi:10.1103/PhysRevLett.129.242001

Nuclear Modification of Transverse Momentum Dependent Parton Distribution Functions by a Global QCD Analysis

Phys Rev Lett. 2022 Dec 9;129(24):242001. doi: 10.1103/PhysRevLett.129.242001.

Authors

Mishary Alrashed¹, Daniele Anderle^{1

2

3}, Zhong-Bo Kang^{1

4

5}, John Terry^{1

4}, Hongxi Xing^{2

3}

Affiliations

¹ Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
² Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou 510006, China.
³ Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Southern Nuclear Science Computing Center, South China Normal University, Guangzhou 510006, China.
⁴ Mani L. Bhaumik Institute for Theoretical Physics, University of California, Los Angeles, California 90095, USA.
⁵ Center for Frontiers in Nuclear Science, Stony Brook University, Stony Brook, New York 11794, USA.

PMID: 36563251
DOI: 10.1103/PhysRevLett.129.242001

Abstract

We perform the first simultaneous global QCD extraction of the transverse momentum dependent (TMD) parton distribution functions and the TMD fragmentation functions in nuclei. We have considered the world set of data from semi-inclusive electron-nucleus deep inelastic scattering and Drell-Yan dilepton production. In total, this data set consists of 90 data points from HERMES, Fermilab, RHIC, and LHC. Working at next-to-leading order and next-to-next-to-leading logarithmic accuracy, we achieve a χ^{2}/d.o.f.=1.196. In this analysis, we perform the first extraction of nuclear modified TMDs and compare these to those in free nucleons. We also make predictions for the ongoing JLab 12 GeV program and future electron-ion collider measurements.