Salajegheh, Maral and Nejad, S. Mohammad Moosavi and Soleymaninia, Maryam and Khanpour, Hamzeh and Tehrani, S. Atashbar (2019) NNLO charmed-meson fragmentation functions and their uncertainties in the presence of meson mass corrections. European Physical Journal C: Particles and Fields, 79 (999). ISSN 1434-6044

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Abstract

The main aim of this paper is to present new sets of non-perturbative fragmentation functions (FFs) for D0 and D+ mesons at next-to-leading (NLO) and, for the first time, at next-to-next-to-leading order (NNLO) in the MS¯¯¯¯¯¯¯ factorization scheme with five massless quark flavors. This new determination of FFs is based on the QCD fit to the OPAL experimental data for hadron production in the electron-positron single-inclusive annihilation (SIA). We discuss in detail the novel aspects of the methodology used in our analysis and the validity of obtained FFs by comparing with previous works in literature which have been carried out up to NLO accuracy. We will also incorporate the effect of charmed meson mass corrections into our QCD analysis and discuss the improvements upon inclusion of these effects. The uncertainties in the extracted FFs as well as in the corresponding observables are estimated using the “Hessian” approach. For a typical application, we use our new FFs to make theoretical predictions for the energy distributions of charmed mesons inclusively produced through the decay of unpolarized top quarks, to be measured at the CERN LHC. As a result of this analysis, suggestions are discussed for possible future studies on the current topic to consider any theory improvements and other available experimental observables.

Item Type:	Article
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. Funded by SCOAP3. Cite as: Salajegheh, M., Moosavi Nejad, S.M., Soleymaninia, M. et al. NNLO charmed-meson fragmentation functions and their uncertainties in the presence of meson mass corrections . Eur. Phys. J. C 79, 999 (2019). https://doi.org/10.1140/epjc/s10052-019-7521-x
Keywords:	NNLO charmed-meson fragmentation functions; uncertainties; meson mass corrections;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	14788
Identification Number:	https://doi.org/10.1140/epjc/s10052-019-7521-x
Depositing User:	Hamzeh Khanpour
Date Deposited:	13 Sep 2021 16:19
Journal or Publication Title:	European Physical Journal C: Particles and Fields
Publisher:	Springer Verlag
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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