Abstract
We show that the chiral SU( n) ⊗ SU( n) flavor symmetry on the null-plane severely restricts the sea quarks in the baryon octet. It predicts large asymmetry for the light sea quarks ( u, d, s), and universality and abundance for the heavy sea quarks. Further it is shown that the existence of the heavy sea quarks constrained by the same symmetry reduces the theoretical value of the Ellis-Jaffe sum rule substantially.
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