https://doi.org/10.1051/epjconf/201713706023
Relativistic corrections to electromagnetic heavy quarkonium production
Technische Universität München, Physik-Department T30f, James-Franck-Str. 1, 85747 Garching, Germany
a e-mail: v.shtabovenko@tum.de
Published online: 22 March 2017
We report on the calculation [1] of the relativistic O(αs0 ν2) corrections to the quarkonium production process e+e− → χcJ + γ in non-relativistic QCD (NRQCD). In our work we incorporate effects from operators that contribute through the sub-leading Fock state |QQ̄g〉, that were not taken into account by previous studies. We determine the corresponding matching coeffcients that should be included into theoretical predictions for the electromagnetic production cross-section of χcJ. This process could be, in principle, measured by the Belle II experiment.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
