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Roman Pasechnik

Senior lecturer

Typical working day..

Light-front approach to axial-vector quarkonium γ * γ * form factors

Author

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

Summary, in English

In this work, we perform a detailed study of transition form factors for axial- vector meson production via the two-photon fusion process γ*γ* → 1++, with space-like virtual photons in the initial state and a P-wave axial-vector quarkonium in the final state. In this analysis, we employ the formalism of light-front quarkonium wave functions obtained from a solution of the Schrödinger equation for a selection of interquark potentials for QQ¯ interaction. We found the helicity structure and covariant decomposition of the matrix elements that can be generically applied for any qq¯ axial-vector meson γ*γ* → 1++ transition, while our numerical results are given for the phenomenologically relevant charmonium χc1 state. We present the helicity form factors as functions of both photon virtualities. We also obtain, that QFLT(Q2, 0)/FTT(Q2, 0) = const.

Department/s

  • Theoretical Particle Physics - Undergoing reorganization

Publishing year

2022-09

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2022

Issue

9

Document type

Journal article

Publisher

Springer

Topic

  • Physical Sciences

Keywords

  • Quarkonium
  • Specific QCD Phenomenology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479