Data di Pubblicazione:
2024
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 þ c-jet production at the LHCb experiment and flavor-tagged structure functions at the Electron-Ion Collider.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Ball, Richard D.; Candido, Alessandro; Cruz-Martinez, Juan; Forte, Stefano; Giani, Tommaso; Hekhorn, Felix; Magni, Giacomo; Nocera, Emanuele R.; Rojo, Juan; Stegeman, Roy; null, null
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