Theoretical uncertainties in exclusive electroproduction of S -wave heavy quarkonia

Cepila, Jan (Aff1, 0000000121738213, grid.6652.7, Czech Technical University in Prague, FNSPE, Břehová 7, 11519, Prague, Czech Republic) ; Nemchik, Jan (Aff1, 0000000121738213, grid.6652.7, Czech Technical University in Prague, FNSPE, Břehová 7, 11519, Prague, Czech Republic) (Aff2, 0000 0004 0488 9791, grid.435184.f, Institute of Experimental Physics SAS, Watsonova 47, 04001, Kosice, Slovakia) ; Krelina, Michal (Aff1, 0000000121738213, grid.6652.7, Czech Technical University in Prague, FNSPE, Břehová 7, 11519, Prague, Czech Republic) (Aff3, 0000 0001 1958 645X, grid.12148.3e, Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaiso, Chile) ; Pasechnik, Roman (Aff4, 0000 0001 0930 2361, grid.4514.4, Department of Astronomy and Theoretical Physics, Lund University, 223 62, Lund, Sweden) (Aff5, 0000 0000 8965 6073, grid.425110.3, Nuclear Physics Institute ASCR, 25068, Řež, Czech Republic) (Aff6, 0000 0001 2188 7235, grid.411237.2, Departamento de Física, CFM, Universidade Federal de Santa Catarina, C.P. 476, CEP 88.040-900, Florianópolis, SC, Brazil)

12 June 2019

Abstract: In this work, we revise the conventional description of J/ψ(1S) \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$J/\psi (1S)$$\end{document} , Υ(1S) \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Upsilon (1S)$$\end{document} , ψ′(2S) \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\psi '(2S)$$\end{document} and Υ′(2S) \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Upsilon '(2S)$$\end{document} elastic photo- and electroproduction off a nucleon target within the color dipole picture and carefully study various sources of theoretical uncertainties in calculations of the corresponding electroproduction cross sections. For this purpose, we test the corresponding predictions using a bulk of available dipole cross section parametrisations obtained from deep inelastic scattering data at HERA. Specifically, we provide the detailed analysis of the energy and hard-scale dependencies of quarkonia yields employing the comprehensive treatment of the quarkonia wave functions in the Schrödinger equation based approach for a set of available c-c¯ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$c-\bar{c}$$\end{document} and b-b¯ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$b-\bar{b}$$\end{document} interquark interaction potentials. Besides, we quantify the effect of Melosh spin rotation, the Q2 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$Q^2$$\end{document} -dependence of the diffractive slope and an uncertainty due to charm and bottom quark mass variations.


Published in: EPJC 79 (2019) 495 DOI: 10.1140/epjc/s10052-019-7016-9
License: CC-BY-3.0



Back to search

Fulltext:
Download fulltextXML Download fulltextPDF (PDFA)