The flavour asymmetry of polarized anti-quarks in the nucleon

Details The flavour asymmetry of polarized anti-quarks in the nucleon The flavour asymmetry of polarized anti-quarks in the nucleon

2001-03-12

arxiv.org/abs/hep-ph/0103113v4

Eur.Phys.J.C21:105-114,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, LaTex, 5 PS figures. Version to appear in Eur. Phys. J. C. An appendix is added for expressions for the helicity dep

Scientific paper

10.1007/s100520100726

We present a study of the flavour asymmetry of polarized anti-quarks in the nucleon using the meson cloud model. We include contributions both from the vector mesons and the interference terms of pseudoscalar and vector mesons. Employing the bag model, we first give the polarized valence quark distribution of the $\rho$ meson and the interference distributions. Our calculations show that the interference effect mildly increases the prediction for $\Delta \dbar(x)-\Delta \ubar(x)$ at intermediate $x$ region. We also discuss the contribution of `Pauli blocking' to the asymmetry.

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