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Leptoproduction of $\rho$-mesons as discriminator for the unintegrated gluon distribution in the proton

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abstract

The gluon content of the proton, in the high-energy regime, is embodied by the unintegrated gluon distribution (UGD), which describes the gluon emission probability, with a given longitudinal momentum fraction and transverse momentum. The UGD, formulated within the $\kappa$-factorization approach, has universal validity and several models for it have been proposed so far. We will show that the polarized $\rho$-meson leptoproduction at HERA is a not trivial testfield for discriminating among existing models of UGD.

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hep-ph 2

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2026 1 2019 1

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UNVERDICTED 2

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