Probing gluon saturation and nuclear structure in photon-nucleus collisions
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909254077644800 |
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| author | Mäntysaari, Heikki Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin |
| author_facet | Mäntysaari, Heikki Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin |
| contents | We calculate exclusive vector meson photoproduction within the Color Glass Condensate framework in high-energy photon-nucleus scattering probed experimentally in ultra peripheral heavy ion collisions at RHIC and at the LHC. When the free parameters are constrained by the $γ+p$ data from HERA, we predict significant nuclear suppression for both the coherent and incoherent photoproduction cross section in the TeV range. Our results indicate that the LHC data prefers even stronger saturation effects at the highest collision energies. Furthermore, we demonstrate how the linear polarization of photons in ulra peripheral collisions generates azimuthal modulations in the decay products of the exclusively produced vector meson. We show how these measurements can probe details of the nuclear geometry, specifically the deformed structure of the uranium nuclei. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_09963 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Probing gluon saturation and nuclear structure in photon-nucleus collisions Mäntysaari, Heikki Salazar, Farid Schenke, Björn Shen, Chun Zhao, Wenbin High Energy Physics - Phenomenology Nuclear Theory We calculate exclusive vector meson photoproduction within the Color Glass Condensate framework in high-energy photon-nucleus scattering probed experimentally in ultra peripheral heavy ion collisions at RHIC and at the LHC. When the free parameters are constrained by the $γ+p$ data from HERA, we predict significant nuclear suppression for both the coherent and incoherent photoproduction cross section in the TeV range. Our results indicate that the LHC data prefers even stronger saturation effects at the highest collision energies. Furthermore, we demonstrate how the linear polarization of photons in ulra peripheral collisions generates azimuthal modulations in the decay products of the exclusively produced vector meson. We show how these measurements can probe details of the nuclear geometry, specifically the deformed structure of the uranium nuclei. |
| title | Probing gluon saturation and nuclear structure in photon-nucleus collisions |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2407.09963 |