@inproceedings{5b66381a9b3745408e5c0a662693f71f,
title = "The onset of spin rotation effects in electroproduction of heavy quarkonia",
abstract = "We discuss the Melosh spin rotation effects in diffractive photo- and electroproduction of heavy quarkonia off a nucleon target in the dipole picture. The quarkonium light-front wave functions are obtained in the Schroedinger equation based formalism using the realistic interquark interaction potentials. A strong onset of spin rotation effects predicted in the case of J/ψ(1S) photoproduction enables us to reach a reasonable agreement with the available data. In the case of radially excited 2S and 3S states these effects are even stronger as a direct manifestation of the nodal structure of their wave functions. In particular, the spin effects enhance the Ψ0(2S) cross section by a factor of 2 − 3 and therefore cause a substantial increase of the Ψ0(2S)-to-J/Ψ(1S) ratio improving the description of experimental data.",
author = "M. Krelina and J. Nemchik and R. Pasechnik and J. Cepila",
year = "2019",
doi = "10.22323/1.364.0496",
language = "English",
volume = "364",
series = "Proceedings of Science",
publisher = "Sissa Medialab srl",
booktitle = "European Physical Society Conference on High Energy Physics (EPS-HEP2019)",
note = "2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 ; Conference date: 10-07-2019 Through 17-07-2019",
}