Intrinsic Charm Flavor and Helicity Content in the Proton ∗
نویسنده
چکیده
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, ∆c ≃ −(0.003 ∼ 0.015). The fraction of the total quark helicity carried by the intrinsic charm is less than 2%. A detail comparison of the quark flavor and spin observables with data and other models or analyses is given. ∗ Invited talk to be presented at the 3rd Circum-Pan-Pacific Symposium on “High Energy Spin Physics”, Beijing, October 8−13, 2001. Typeset using REVTEX
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