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The onset of spin rotation effects in electroproduction of heavy quarkonia

Krelina, M. ; Nemchik, J. ; Pasechnik, R. LU and Cepila, J. (2019) 2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 In Proceedings of Science 364.
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... (More)

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.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
European Physical Society Conference on High Energy Physics (EPS-HEP2019)
series title
Proceedings of Science
volume
364
article number
496
conference name
2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019
conference location
Ghent, Belgium
conference dates
2019-07-10 - 2019-07-17
external identifiers
  • scopus:85098919074
ISSN
1824-8039
DOI
10.22323/1.364.0496
language
English
LU publication?
yes
id
5b66381a-9b37-4540-8e5c-0a662693f71f
date added to LUP
2021-01-18 14:49:40
date last changed
2024-03-21 02:30:47
@inproceedings{5b66381a-9b37-4540-8e5c-0a662693f71f,
  abstract     = {{<p>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 Ψ<sup>0</sup>(2S) cross section by a factor of 2 − 3 and therefore cause a substantial increase of the Ψ<sup>0</sup>(2S)-to-J/Ψ(1S) ratio improving the description of experimental data.</p>}},
  author       = {{Krelina, M. and Nemchik, J. and Pasechnik, R. and Cepila, J.}},
  booktitle    = {{European Physical Society Conference on High Energy Physics (EPS-HEP2019)}},
  issn         = {{1824-8039}},
  language     = {{eng}},
  series       = {{Proceedings of Science}},
  title        = {{The onset of spin rotation effects in electroproduction of heavy quarkonia}},
  url          = {{http://dx.doi.org/10.22323/1.364.0496}},
  doi          = {{10.22323/1.364.0496}},
  volume       = {{364}},
  year         = {{2019}},
}