Global Bayesian Analysis of $\mathrm{J}/ψ$ Photoproduction on Proton and Lead Targets
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866915761480531968 |
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| author | Mäntysaari, Heikki Roch, Hendrik Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin |
| author_facet | Mäntysaari, Heikki Roch, Hendrik Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin |
| contents | We perform a global Bayesian analysis of diffractive $\mathrm{J}/ψ$ production in $γ+p$ and $γ+\mathrm{Pb}$ collisions using a color glass condensate (CGC) based calculation framework. As past calculations have shown that CGC-based models typically overpredict the $\mathrm{J}/ψ$ production in $γ+\mathrm{Pb}$ collisions at high center of mass energy, we address the question of whether it is possible to describe coherent and incoherent diffractive $\mathrm{J}/ψ$ data from $γ+p$ collisions at HERA and the LHC, and from $γ+\mathrm{Pb}$ collisions at the LHC simultaneously. Our results indicate that a simultaneous description of $γ+p$ and $γ+\mathrm{Pb}$ data is challenging, with results improving when an overall $K$-factor -- scaling $γ+p$ and $γ+\mathrm{Pb}$ cross sections to absorb model uncertainties -- is introduced. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_14087 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Global Bayesian Analysis of $\mathrm{J}/ψ$ Photoproduction on Proton and Lead Targets Mäntysaari, Heikki Roch, Hendrik Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin High Energy Physics - Phenomenology Nuclear Theory We perform a global Bayesian analysis of diffractive $\mathrm{J}/ψ$ production in $γ+p$ and $γ+\mathrm{Pb}$ collisions using a color glass condensate (CGC) based calculation framework. As past calculations have shown that CGC-based models typically overpredict the $\mathrm{J}/ψ$ production in $γ+\mathrm{Pb}$ collisions at high center of mass energy, we address the question of whether it is possible to describe coherent and incoherent diffractive $\mathrm{J}/ψ$ data from $γ+p$ collisions at HERA and the LHC, and from $γ+\mathrm{Pb}$ collisions at the LHC simultaneously. Our results indicate that a simultaneous description of $γ+p$ and $γ+\mathrm{Pb}$ data is challenging, with results improving when an overall $K$-factor -- scaling $γ+p$ and $γ+\mathrm{Pb}$ cross sections to absorb model uncertainties -- is introduced. |
| title | Global Bayesian Analysis of $\mathrm{J}/ψ$ Photoproduction on Proton and Lead Targets |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2507.14087 |