The dipole picture and the non-relativistic expansion
1 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela. E-15782, Galicia, Spain
2 Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, Finland
3 Helsinki Institute of Physics, University of Helsinki, P.O. Box 64 00014, Finland
Published online: 11 January 2022
We study exclusive quarkonium production in the dipole picture at next-to-leading order (NLO) accuracy, using the non-relativistic expansion for the quarkonium wavefunction. The quarkonium light cone wave functions needed in the dipole picture have typically been available only at tree level, either in phenomenological models or in the nonrelativistic limit. Here, we discuss the compatibility of the dipole approach and the non-relativistic expansion and compute NLO relativistic corrections to the quarkonium light-cone wave function in light-cone gauge.
© The Authors, published by EDP Sciences, 2022
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