Soleymaninia, Maryam and Abdolmaleki, Hamed and Khanpour, Hamzeh (2020) First NNLO fragmentation functions of K0S and Lambda and their uncertainties in the presence of hadron mass corrections. Physical Review D, 102 (114029). ISSN 2470-0029

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Abstract

The current paper presents a determination of K^0_SK S0 and \Lambda/\bar{\Lambda}Λ/ Λ ˉ fragmentation functions (FFs) from QCD analysis of single-inclusive electron-positron annihilation process (SIA). Our FFs determinations are performed at next-to-leading order (NLO), and for the first time, at next-to-next-to-leading order (NNLO) accuracy in perturbative Quantum Chromodynamics (pQCD) which is designated as {\tt SAK20} FFs. Each of these FFs is accompanied by their uncertainties which are determined using the `Hessian' method. Considering the hadron mass corrections, we clearly investigate the reliability of our results upon the inclusion of higher-order QCD correction. We provide comparisons of {\tt SAK20} FFs set with the available analysis from another group, finding in general a reasonable agreement, and also considerable differences. In order to judge the fit quality, our theoretical predictions are compared with the analyzed SIA datasets. {\tt SAK20} FFs at NLO and NNLO accuracy along with their uncertainties are made available in the standard {\tt LHAPDF} format in order to use for predictions of present and future measurements in high-energy collisions such as LHC and RHIC.

Item Type:	Article
Additional Information:	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. Cite as: Soleymaninia, M. & Abdolmaleki, Hamed & Khanpour, Hamzeh. (2020). First NNLO fragmentation functions of K0S and Lambda and their uncertainties in the presence of hadron mass corrections. Physical Review D. 102. 10.1103/PhysRevD.102.114029.
Keywords:	NNLO fragmentation functions; K0S; Lambda; uncertainties; hadron mass corrections;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	14752
Identification Number:	https://doi.org/10.1103/PhysRevD.102.114029
Depositing User:	Hamzeh Khanpour
Date Deposited:	06 Sep 2021 16:34
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)
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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