Relativistic corrections to electromagnetic heavy quarkonium production
Technische Universität München, Physik-Department T30f, James-Franck-Str. 1, 85747 Garching, Germany
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Published online: 22 March 2017
We report on the calculation  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
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