Theoretical uncertainties in exclusive electroproduction of S-wave heavy quarkonia

Research output: Contribution to journalArticle

Abstract

In this work, we revise the conventional description of J/ ψ(1 S) , Υ (1 S) , ψ(2 S) and Υ (2 S) 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¯ and b- b¯ interquark interaction potentials. Besides, we quantify the effect of Melosh spin rotation, the Q2-dependence of the diffractive slope and an uncertainty due to charm and bottom quark mass variations.

Details

Authors
Organisations
External organisations
  • Czech Technical University in Prague
  • Institute of Experimental Physics SAS
  • Federico Santa Maria Technical University
  • Federal University of Santa Catarina
  • Nuclear Physics Institute, ASCR
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number495
JournalEuropean Physical Journal C
Volume79
Issue number6
Publication statusPublished - 2019 Jun 1
Publication categoryResearch
Peer-reviewedYes