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Measurement of the cross-section ratio σ$_{ψ(2S)}$/σ$_{J/ψ(1S)}$ in exclusive photoproduction at HERA
The exclusive photoproduction reactions γp → J/ψ(1S)p and γp → ψ(2S)p have been measured at an ep centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{−1}$. The measurement was made in the kinematic range 30 < W < 180 GeV, Q$^{2}$< 1 GeV...
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Lenguaje: | eng |
Publicado: |
2022
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1007/JHEP12(2022)164 http://cds.cern.ch/record/2845899 |