Document Type

Article

Publication Date

2021

DOI

10.1103/PhysRevD.104.016015

Publication Title

Physical Review D

Volume

104

Issue

1

Pages

016015 (1-19)

Abstract

We perform a comprehensive new Monte Carlo analysis of high-energy lepton-lepton, lepton-hadron and hadron-hadron scattering data to simultaneously determine parton distribution functions (PDFs) in the proton and parton to hadron fragmentation functions (FFs). The analysis includes all available semi-inclusive deep-inelastic scattering and single-inclusive e+e− annihilation data for pions, kaons and unidentified charged hadrons, which allows the flavor dependence of the fragmentation functions to be constrained. Employing a new multistep fitting strategy and more flexible parametrizations for both PDFs and FFs, we assess the impact of different datasets on sea quark densities and confirm the previously observed suppression of the strange quark distribution. The new fit, which we refer to as “JAM20-SIDIS,” will allow for improved studies of universality of parton correlation functions, including transverse momentum dependent (TMD) distributions, across a wide variety of process, and the matching of collinear to TMD factorization descriptions.

Comments

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International 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

Moffat, E., Melnitchouk, W., Rogers, T. C., Sato, N. & Jefferson Lab Angular Momentum Collaboration (2021). Simultaneous Monte Carlo analysis of parton densities and fragmentation functions. Physical Review D, 104(1), 1-19, Article 016015. https://doi.org/10.1103/PhysRevD.104.016015

ORCID

0000-0002-0762-0275 (Rogers)

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