Inclusive $\mathrm{J}/ψ$ production in forward proton-proton and proton-lead collisions at high energy
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929484194643968 |
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| author | Gimeno-Estivill, Patricia Lappi, Tuomas Mäntysaari, Heikki |
| author_facet | Gimeno-Estivill, Patricia Lappi, Tuomas Mäntysaari, Heikki |
| contents | We calculate the cross section for forward $\mathrm{J}/ψ$ production in proton-proton and minimum bias proton-lead collisions using the Color Glass Condensate (CGC) and Non-Relativistic QCD (NRQCD) formalism consistently with Deep Inelastic Scattering data. The cross section for color singlet states is sensitive to a 4-point correlator of Wilson lines for which we describe in the Gaussian approximation in the large-$N_c$ limit. Furthermore, we quantify the importance of finite-$N_c$ corrections to have a small $\sim 12\%$ effect. In contrast with the generic NRQCD expectation, we show that the color singlet contribution is only $15\%$ to the total cross section. We also compare our predictions for $\mathrm{J}/ψ$ production as well as for the nuclear modification ratio $R_{pPb}$ to LHCb and ALICE data. We find a good agreement at forward rapidities, except at low transverse momenta where the cross sections are overestimated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01791 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inclusive $\mathrm{J}/ψ$ production in forward proton-proton and proton-lead collisions at high energy Gimeno-Estivill, Patricia Lappi, Tuomas Mäntysaari, Heikki High Energy Physics - Phenomenology We calculate the cross section for forward $\mathrm{J}/ψ$ production in proton-proton and minimum bias proton-lead collisions using the Color Glass Condensate (CGC) and Non-Relativistic QCD (NRQCD) formalism consistently with Deep Inelastic Scattering data. The cross section for color singlet states is sensitive to a 4-point correlator of Wilson lines for which we describe in the Gaussian approximation in the large-$N_c$ limit. Furthermore, we quantify the importance of finite-$N_c$ corrections to have a small $\sim 12\%$ effect. In contrast with the generic NRQCD expectation, we show that the color singlet contribution is only $15\%$ to the total cross section. We also compare our predictions for $\mathrm{J}/ψ$ production as well as for the nuclear modification ratio $R_{pPb}$ to LHCb and ALICE data. We find a good agreement at forward rapidities, except at low transverse momenta where the cross sections are overestimated. |
| title | Inclusive $\mathrm{J}/ψ$ production in forward proton-proton and proton-lead collisions at high energy |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.01791 |