Soleymaninia, Maryam and Goharipour, Muhammad and Khanpour, Hamzeh (2018) First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order. Physical Review D, 98 (074002). ISSN 2470-0029

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Abstract

In this paper, we present SGK18 FFs, a first QCD analysis of Parton-to- unidentified charged hadrons fragmentation functions (FFs) at next-to-next-to-leading order (NNLO) accuracy in perturbative QCD. This analysis is based on single-inclusive charged hadron production in electron-positron (e−eþ) annihilation. The uncertainties in the extraction of SGK18 FFs as well as the corresponding observables are estimated using the “Hessian” technique. We study the quality of the SGK18 FFs determined in this analysis by comparing them with the recent results in the literature.We also show how SGK18 FFs results describe the available data for single-inclusive unidentified charged hadron production in e−eþ annihilation. We demonstrate that the theoretical uncertainties due to the variation of the renormalization and factorization scales improve when NNLO QCD corrections are considered. We find that the resulting SGK18 FFs are in good agreement with all data analyzed and the inclusion of NNLO corrections tends to improve the data description with somewhat smaller uncertainty.

Item Type:	Article
Additional Information:	Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/. 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. Cite as: Soleymaninia, M. & Goharipour, Muhammad & Khanpour, Hamzeh. (2018). First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order. Published in: Phys.Rev.D 98 (2018) 7, 074002. DOI: 10.1103/PhysRevD.98.074002
Keywords:	First QCD analysis; charged hadron fragmentation functions; uncertainties; next-to-next-to-leading order; fragmentation into hadrons;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	14779
Identification Number:	https://doi.org/10.1103/PhysRevD.98.074002
Depositing User:	Hamzeh Khanpour
Date Deposited:	10 Sep 2021 14:47
Journal or Publication Title:	Physical Review D
Publisher:	American Physical Society
Refereed:	Yes
Funders:	School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), University of Science and Technology of Mazandaran
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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