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Publication Information
Title Azimuthal asymmetries in unpolarized SIDIS and Drell-Yan processes: a case study towards TMD factorization at subleading twist
Abstract We consider the azimuthal distribution of the final observed hadron in semi-inclusive deep-inelastic scattering and the lepton pair in the Drell-Yan process. In particular, we focus on the $\cos \phi$ modulation of the unpolarized cross section and on its dependence upon transverse momentum. At low transverse momentum, for these observables we propose a factorized expression based on tree-level approach and conjecture that the same formula is valid in transverse-momentum dependent (TMD) factorization when written in terms of subtracted TMD parton distributions. Our formula correctly matches with the collinear factorization results at high transverse momentum, solves a long-standing problem and is a necessary step towards the extension of the TMD factorization theorems up to the subleading twist.
Author(s) Alexei Prokudin, Alessandro Bacchetta, Marco Radici, M. Echevarria, C. Pisano, Giuseppe Bozzi
Publication Date October 2019
Document Type Journal Article
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP), NSF, ERC
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-19-2963 OSTI Number: 1564256
LANL Number: arXiv:1906.07037 Other Number: DOE/OR/23177-4710
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physics Letters B
Refereed Yes
Volume 797
Issue
Page(s) 134850
Attachments/Datasets/DOI Link
Document(s)
cosphi_final.pdf (STI Document)
1-s2.0-S0370269319305647-main.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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