Intrinsic charm and D⁺D^- asymmetry produced in proton-proton collisions

2025/01/05 by G. I. Lykasov, Lykasov, G. I., М. Н. Сороковиков +3
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Physics - Phenomenology (hep-ph) #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.2501.02507

openalex publication_date 2025/01/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the contribution of the charm-anticharrm (c c) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of D⁺D^- and D⁰ D⁰ mesons produced in pp collisions at large Feynman variables x. It is shown that an important tool for the establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in pp collisions. Predictions for the asymmetry as function of x for different IC probabilities are presented. We show that the interference of the intrinsic |uud c c> Fock state with the standard contribution from the PQCD evolution leads to a large D⁺D^- asymmetry at large Feynman x.

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