2001/09/30 by Xiaotong Song
Physics and Astronomy · #B meson #Charm (quantum number) #Charm quark #Flavor #Helicity #High-Energy Particle Collisions Research #Meson #Nuclear physics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Proton spin crisis #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ph
paper · pdf · doi:10.1142/s0217751x0301499x
published as Int.J.Mod.Phys. A18 (2003) 1501-1508 · 4 pages, 2 tables (revised version)
arxiv created 2001/10/28 · openalex publication_date 2003/03/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Contributions to the quark flavor and spin observables from the intrinsic charm in the proton are discussed in the SU(4) quark meson fluctuation model. Our results suggest that the probability of finding the intrinsic charm in the proton is less than 1%. The intrinsic charm helicity is small and negative, Δc ≃ -(0.003 ~ 0.015). The fraction of the total quark helicity carried by the intrinsic charm is less than 2%. A brief comparison of the quark flavor and spin observables with data and other models or analyses is given.