Determination of charged pion unpolarised TMDPDFs from Drell-Yan measurements
Abstract
We present an extraction of the unpolarised transverse momentum dependent (TMD) parton distribution functions (PDFs) for the valence quarks in the pion from experimental mea- surements of the Drell-Yan process. The procedure adopted in this project relies on the framework of TMD factorisation, and the inputs of nucleon TMDPDF, pion collinear PDF, as well as the Collins-Soper kernel. The non-perturbative behaviour of the TMDPDFs is parameterised using an ansatz function that contains three unknown parameters and implements an exponential decay at large transverse distances. This work employs the most recent results in perturbation theory, and utilises a precise estimation of the nucleon TMDPDF. We perform an investigation of data used in the fit. This investigation leads to important observations regarding the effects of the kinematics and binning methods in the experimental data. Our results agree qualitatively with the previous determinations from phenomenology and a lattice computation
Related
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BibTeX
@misc{chang2026determination,
title = {{Determination of charged pion unpolarised TMDPDFs from Drell-Yan measurements}},
author = {Wen-Chen Chang and Chia-Yu Hsieh and Chung-Wen Kao and C. -J. David Lin and Valentin Moos and Wayne Morris},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.15168},
eprint = {2609.15168},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.15168},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Determination of charged pion unpolarised TMDPDFs from Drell-Yan measurements
AU - Wen-Chen Chang
AU - Chia-Yu Hsieh
AU - Chung-Wen Kao
AU - C. -J. David Lin
AU - Valentin Moos
AU - Wayne Morris
PY - 2026
DA - 2026/09/14
PB - arXiv
DO - 10.48550/arxiv.2609.15168
UR - https://arxiv.org/abs/2609.15168
AB - We present an extraction of the unpolarised transverse momentum dependent (TMD) parton distribution functions (PDFs) for the valence quarks in the pion from experimental mea- surements of the Drell-Yan process. The procedure adopted in this project relies on the framework of TMD factorisation, and the inputs of nucleon TMDPDF, pion collinear PDF, as well as the Collins-Soper kernel. The non-perturbative behaviour of the TMDPDFs is parameterised using an ansatz function that contains three unknown parameters and implements an exponential decay at large transverse distances. This work employs the most recent results in perturbation theory, and utilises a precise estimation of the nucleon TMDPDF. We perform an investigation of data used in the fit. This investigation leads to important observations regarding the effects of the kinematics and binning methods in the experimental data. Our results agree qualitatively with the previous determinations from phenomenology and a lattice computation
ER -