Suppression of diffraction in DIS on nuclei and dynamical mechanism of leading twist nuclear shadowing
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916482357657600 |
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| author | Guzey, V. |
| author_facet | Guzey, V. |
| contents | Using the leading twist approach (LTA) to nuclear shadowing (NS), we calculate the ratio of the diffractive-to-total DIS cross sections $R_{\rm diff/tot}$ for a heavy nucleus and proton and confirm that $R_{\rm diff/tot} \approx 0.5-1$ in contrast with $R_{\rm diff/tot} \approx 1.5-2$ in the dipole model. We show that the magnitude of $R_{\rm diff/tot}$ is controlled by an effective dipole cross section so that $R_{\rm diff/tot} \to 1$ in the black disk limit. We also argue that strong leading twist NS as well as the dilute nuclear density deplete nuclear enhancement of the saturation scale leading to $Q_{sA}^2(b=0)/Q_{sp}^2(b=0) \sim 1$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_10103 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Suppression of diffraction in DIS on nuclei and dynamical mechanism of leading twist nuclear shadowing Guzey, V. High Energy Physics - Phenomenology Using the leading twist approach (LTA) to nuclear shadowing (NS), we calculate the ratio of the diffractive-to-total DIS cross sections $R_{\rm diff/tot}$ for a heavy nucleus and proton and confirm that $R_{\rm diff/tot} \approx 0.5-1$ in contrast with $R_{\rm diff/tot} \approx 1.5-2$ in the dipole model. We show that the magnitude of $R_{\rm diff/tot}$ is controlled by an effective dipole cross section so that $R_{\rm diff/tot} \to 1$ in the black disk limit. We also argue that strong leading twist NS as well as the dilute nuclear density deplete nuclear enhancement of the saturation scale leading to $Q_{sA}^2(b=0)/Q_{sp}^2(b=0) \sim 1$. |
| title | Suppression of diffraction in DIS on nuclei and dynamical mechanism of leading twist nuclear shadowing |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.10103 |