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Exclusive emissions of rho-mesons and the unintegrated gluon distribution
by Andrèe Dafne Bolognino, Francesco Giovanni Celiberto, Dmitry Yu. Ivanov, Alessandro Papa
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Submission summary
| Authors (as registered SciPost users): | Francesco Giovanni Celiberto · Alessandro Papa |
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| Preprint Link: | https://arxiv.org/abs/2107.12725v1 (pdf) |
| Date accepted: | 2022-03-09 |
| Date submitted: | 2021-07-28 15:20 |
| Submitted by: | Celiberto, Francesco Giovanni |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
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| Approach: | Phenomenological |
Abstract
Exclusive emissions of vector mesons in forward directions of rapidity offer us a faultless chance to probe the proton structure at small-$x$. A high-energy factorization formula is established within BFKL, given as the convolution of an impact factor depicting the forward-meson emission and of an unintegrated gluon distribution (UGD) driving the gluon evolution at small-$x$. As a nonperturbative quantity, the UGD is not well known and several models for it exist. We present recent progresses on the study of the exclusive forward $\rho$-meson leptoproduction at HERA and EIC energies, showing how osbervables sensitive to different polarization states of the $\rho$-particle act as discriminators for the existing UGD models.
Published as SciPost Phys. Proc. 8, 089 (2022)