Probing gluonic saturation in deeply virtual meson production beyond leading power
Abstract
Exclusive diffractive meson production represents a golden channel for investigating gluonic saturation inside nucleons and nuclei. In this letter, we settle a systematic framework to deal with beyond leading power corrections at small-$x$, including the saturation regime, and obtain the $\gamma^{*} \rightarrow M (\rho, \phi, \omega)$ impact factor with both incoming photon and outgoing meson carrying arbitrary polarizations. This is of particular interest since the saturation scale at modern colliders, although entering a perturbative regime, is not large enough to prevents higher-twist effects to be sizable.
- Publication:
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arXiv e-prints
- Pub Date:
- July 2024
- DOI:
- 10.48550/arXiv.2407.18203
- arXiv:
- arXiv:2407.18203
- Bibcode:
- 2024arXiv240718203B
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- High Energy Physics - Theory
- E-Print:
- 8 pages, 2 figures