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Roman Pasechnik

Senior lecturer

Typical working day..

Hadroproduction of scalar P -wave quarkonia in the light-front kT -factorization approach

Author

  • Izabela Babiarz
  • Roman Pasechnik
  • Wolfgang Schäfer
  • Antoni Szczurek

Summary, in English

In this work, we present a thorough analysis of scalar P -wave χQ0, Q = c, b quarkonia electromagnetic form factors for the γγ→ χQ0 couplings, as well as their hadroproduction observables in k-factorisation using the light-front (LF) potential approach for the quarkonium wave function. The electromagnetic form factors are presented as functions of photon virtualities. We discuss the role of the Melosh spin-rotation and relativistic corrections estimated by comparing our results with those in the standard nonrelativistic QCD (NRQCD) approach. Theoretical uncertainties of our approach are found by performing the analysis with two different unintegrated gluon densities and with five distinct models of the QQ¯ interaction potentials consistent with the meson spectra. The results for the rapidity and transverse momentum distributions of χQ0 produced in high-energy pp collisions at s = 13 TeV are shown.

Department/s

  • Theoretical Particle Physics

Publishing year

2020

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2020

Issue

6

Document type

Journal article

Publisher

Springer

Topic

  • Physical Sciences

Keywords

  • QCD Phenomenology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1126-6708