A model prediction for polarized antiquark flavor asymmetry
Abstract
Polarized flavor asymmetry Delta u-bar/Delta d-bar is investigated in a meson-cloud model. A polarized nucleon splits into a rho meson and a baryon, then the polarized rho meson interacts with the virtual photon. Because of the difference between the longitudinally polarized distributions Delta u-bar and Delta d-bar in rho, the polarized flavor asymmetry is produced in the nucleon. In addition, we show that the g2 part of rho contributes to the asymmetry especially at medium x with small Q2.
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