2021 Impact factor 4.991
Particles and Fields
Eur. Phys. J. C 10, 143-151
DOI 10.1007/s100529900072

On the polarization of the nucleon sea in the meson-cloud model

K.G. Boreskov - A.B. Kaidalov

ITEP, B.Cheremushkinskaya 25, 117259 Moscow, Russia

Received: 30 October 1998 / Revised version: 4 February 1999 / Published online: 15 July 1999

We show that the meson-cloud model predicts a substantial polarization of the sea quarks of the nucleon, because of the interference of $\pi$ and $\rho$ exchanges. This polarization is strongly flavour-dependent. The model gives an explanation of the strong increase in the structure function g1 that has isospin I=1 at small x.

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