Data di Pubblicazione:
2024
Citazione:
Intrinsic charm quark valence distribution of the proton / R.D. Ball, A. Candido, J. Cruz-Martinez, S. Forte, T. Giani, F. Hekhorn, G. Magni, E.R. Nocera, J. Rojo, R. Stegeman. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 109:9(2024 May 01), pp. L091501.1-L091501.7. [10.1103/physrevd.109.l091501]
Abstract:
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 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.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
R.D. Ball, A. Candido, J. Cruz-Martinez, S. Forte, T. Giani, F. Hekhorn, G. Magni, E.R. Nocera, J. Rojo, R. Stegeman
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