Antiquark Polarization inside the Proton is Small

Quark contributions to the proton spin as deduced from polarized DIS of leptons off a nucleon target, and the octet baryon magnetic moments, can be used to deduce the antiquark polarizations $Δ_{\overline{q}}$ inside the proton. In this way, the 1992 analysis by Karl is shown to imply $Δ_{\overline{q}}\simeq 0.$ Such a spin structure fits nicely into the chiral quark interpretation of the proton spin and flavor puzzles.

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