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Updated: May 28, 2025

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Probing Gluonic Saturation in Deeply Virtual Meson Production beyond Leading Power
Renaud Boussarie1, Michael Fucilla2, Lech Szymanowski3
1Institut Polytechnique de Paris, Ecole Polytechnique, CPHT, CNRS, 91128 Palaiseau, France.
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 γ^{*}→M(ρ,ϕ,ω) 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 prevent higher-twist effects to be sizable.
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