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Roman Pasechnik

Senior lecturer

Typical working day..

Theoretical uncertainties in exclusive electroproduction of S-wave heavy quarkonia

Author

  • Jan Cepila
  • Jan Nemchik
  • Michal Krelina
  • Roman Pasechnik

Summary, in English

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.

Department/s

  • Theoretical Particle Physics

Publishing year

2019-06-01

Language

English

Publication/Series

European Physical Journal C

Volume

79

Issue

6

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044