On the gluon shadowing effect in light and heavy nuclei at small $x$
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915272641740800 |
|---|---|
| author | Lipatov, A. V. Lykasov, G. I. Malyshev, M. A. |
| author_facet | Lipatov, A. V. Lykasov, G. I. Malyshev, M. A. |
| contents | We propose new Transverse Momentum Dependent (TMD) gluon densities in nuclei. Our method is based on a combination of the color dipole scattering formalism, within which we interpret the nuclear deep inelastic structure functions $F_2^{A}(x, Q^2)$ and well established property of geometrical scaling from nucleons to nuclei. As an input, we employ the TMD gluon density in a proton which provides a self-consistent simultaneous description of the numerous HERA and LHC data on $pp$, $ep$ and $γp$ processes. After fitting the relevant phenomenological parameters to the experimental data on the ratios $F_2^{A}(x, Q^2)/F_2^{A^\prime}(x, Q^2)$ for several nuclear targets $A$ and $A^\prime$, we derive the corresponding nuclear gluon distributions. Then, we make predictions for gluon shadowing effects at small Bjorken $x$ in their dependence of the mass number $A$. A comparison with other approaches is given. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_01770 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the gluon shadowing effect in light and heavy nuclei at small $x$ Lipatov, A. V. Lykasov, G. I. Malyshev, M. A. High Energy Physics - Phenomenology We propose new Transverse Momentum Dependent (TMD) gluon densities in nuclei. Our method is based on a combination of the color dipole scattering formalism, within which we interpret the nuclear deep inelastic structure functions $F_2^{A}(x, Q^2)$ and well established property of geometrical scaling from nucleons to nuclei. As an input, we employ the TMD gluon density in a proton which provides a self-consistent simultaneous description of the numerous HERA and LHC data on $pp$, $ep$ and $γp$ processes. After fitting the relevant phenomenological parameters to the experimental data on the ratios $F_2^{A}(x, Q^2)/F_2^{A^\prime}(x, Q^2)$ for several nuclear targets $A$ and $A^\prime$, we derive the corresponding nuclear gluon distributions. Then, we make predictions for gluon shadowing effects at small Bjorken $x$ in their dependence of the mass number $A$. A comparison with other approaches is given. |
| title | On the gluon shadowing effect in light and heavy nuclei at small $x$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.01770 |