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Abstract / Description of output
The cross-sections of exclusive (coherent) photoproduction J/ψ and ψ(2S)
mesons in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV are measured using a data sample corresponding to an integrated luminosity of 228 ± 10 μb−1, collected by the LHCb experiment in 2018. The differential cross-sections are measured separately as a function of transverse momentum and rapidity in the nucleus-nucleus centre-of-mass frame for J/ψ and ψ(2S) mesons. The integrated cross-sections are measured to be σcohJ/ψ = 5.965 ± 0.059 ± 0.232 ± 0.262 mb and σcohψ(2S) = 0.923 ± 0.086 ± 0.028 ± 0.040 mb, where the first listed uncertainty is statistical,
the second systematic and the third due to the luminosity determination. The cross-section ratio is measured to be σcohψ(2S)/σcohJ/ψ = 0.155 ± 0.014 ± 0.003, where the first uncertainty is statistical and the second is systematic. These results are compatible with theoretical predictions.
mesons in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV are measured using a data sample corresponding to an integrated luminosity of 228 ± 10 μb−1, collected by the LHCb experiment in 2018. The differential cross-sections are measured separately as a function of transverse momentum and rapidity in the nucleus-nucleus centre-of-mass frame for J/ψ and ψ(2S) mesons. The integrated cross-sections are measured to be σcohJ/ψ = 5.965 ± 0.059 ± 0.232 ± 0.262 mb and σcohψ(2S) = 0.923 ± 0.086 ± 0.028 ± 0.040 mb, where the first listed uncertainty is statistical,
the second systematic and the third due to the luminosity determination. The cross-section ratio is measured to be σcohψ(2S)/σcohJ/ψ = 0.155 ± 0.014 ± 0.003, where the first uncertainty is statistical and the second is systematic. These results are compatible with theoretical predictions.
| Original language | English |
|---|---|
| Article number | 146 |
| Pages (from-to) | 1-24 |
| Number of pages | 24 |
| Journal | Journal of High Energy Physics |
| Volume | 2023 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 23 Jun 2023 |
Keywords / Materials (for Non-textual outputs)
- Heavy Ion Experiments
- Heavy-Ion Collision
- Photon Production
- Quarkonium