https://doi.org/10.1140/epjc/s10052-019-7016-9
Regular Article - Theoretical Physics
Theoretical uncertainties in exclusive electroproduction of S-wave heavy quarkonia
1
Czech Technical University in Prague, FNSPE, Břehová 7, 11519, Prague, Czech Republic
2
Institute of Experimental Physics SAS, Watsonova 47, 04001, Kosice, Slovakia
3
Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaiso, Chile
4
Department of Astronomy and Theoretical Physics, Lund University, 223 62, Lund, Sweden
5
Nuclear Physics Institute ASCR, 25068, Řež, Czech Republic
6
Departamento de Física, CFM, Universidade Federal de Santa Catarina, C.P. 476, Florianópolis, SC, CEP 88.040-900, Brazil
* e-mail: nemcik@saske.sk
Received:
2
April
2019
Accepted:
1
June
2019
Published online:
12
June
2019
In this work, we revise the conventional description of 
, 
, 
and 
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 
and 
interquark interaction potentials. Besides, we quantify the effect of Melosh spin rotation, the 
-dependence of the diffractive slope and an uncertainty due to charm and bottom quark mass variations.
© The Author(s), 2019
