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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2407.18115 |
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| _version_ | 1866915048907079680 |
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| author | Boussarie, Renaud Fucilla, Michael Szymanowski, Lech Wallon, Samuel |
| author_facet | Boussarie, Renaud Fucilla, Michael Szymanowski, Lech Wallon, Samuel |
| contents | We develop a framework combining the higher-twist formalism of exclusive processes in the $s$ channel with the semi-classical effective description of small-$x$ physics in the $t$ channel. We apply it to transversely polarized light vector meson production, $γ^{*} p \rightarrow V (ρ, φ,ω) \; p$, which starts at the next-to-leading power and for which a purely collinear treatment leads to end-point singularities. The result is obtained in the most general kinematics, including both forward and non-forward cases by preserving the full impact parameter dependence in the non-perturbative correlators, in both momentum and coordinate space representations. A systematic expansion of the Wilson lines in terms of Reggeized gluon fields is performed in order to obtain the results in the weak-field BFKL approximation. These new results will allow for investigating the dilute-to-dense regime transition of QCD for a wide class of observables. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_18115 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Twist corrections to exclusive vector meson production in a saturation framework Boussarie, Renaud Fucilla, Michael Szymanowski, Lech Wallon, Samuel High Energy Physics - Phenomenology High Energy Physics - Theory We develop a framework combining the higher-twist formalism of exclusive processes in the $s$ channel with the semi-classical effective description of small-$x$ physics in the $t$ channel. We apply it to transversely polarized light vector meson production, $γ^{*} p \rightarrow V (ρ, φ,ω) \; p$, which starts at the next-to-leading power and for which a purely collinear treatment leads to end-point singularities. The result is obtained in the most general kinematics, including both forward and non-forward cases by preserving the full impact parameter dependence in the non-perturbative correlators, in both momentum and coordinate space representations. A systematic expansion of the Wilson lines in terms of Reggeized gluon fields is performed in order to obtain the results in the weak-field BFKL approximation. These new results will allow for investigating the dilute-to-dense regime transition of QCD for a wide class of observables. |
| title | Twist corrections to exclusive vector meson production in a saturation framework |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2407.18115 |