The intrinsic charm quark valence distribution of the proton
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arXiv
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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Preprint |
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2023
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| author | Ball, Richard D. Candido, Alessandro Cruz-Martinez, Juan Forte, Stefano Giani, Tommaso Hekhorn, Felix Magni, Giacomo Nocera, Emanuele R. Rojo, Juan Stegeman, Roy |
| author_facet | Ball, Richard D. Candido, Alessandro Cruz-Martinez, Juan Forte, Stefano Giani, Tommaso Hekhorn, Felix Magni, Giacomo Nocera, Emanuele R. Rojo, Juan Stegeman, Roy |
| contents | We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e. a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated, hence our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions (PDFs) of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment, and flavor-tagged structure functions at the Electron-Ion Collider. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_00743 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | The intrinsic charm quark valence distribution of the proton Ball, Richard D. Candido, Alessandro Cruz-Martinez, Juan Forte, Stefano Giani, Tommaso Hekhorn, Felix Magni, Giacomo Nocera, Emanuele R. Rojo, Juan Stegeman, Roy High Energy Physics - Phenomenology High Energy Physics - Experiment We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e. a nonvanishing intrinsic valence charm distribution. A significant nonvanishing valence component cannot be perturbatively generated, hence our results reinforce previous evidence that the proton contains an intrinsic (i.e., not radiatively generated) charm quark component. We establish our result through a determination of the parton distribution functions (PDFs) of charm quarks and antiquarks in the proton. We propose two novel experimental probes of this intrinsic charm valence component: D-meson asymmetries in Z+c-jet production at the LHCb experiment, and flavor-tagged structure functions at the Electron-Ion Collider. |
| title | The intrinsic charm quark valence distribution of the proton |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2311.00743 |