Quark Contributions to the Proton Spin and Tensor Charge

1997/12/05 by Han-xin He, He, Han-xin
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9712272

RevTeX file, 8 pages, no figure

arxiv created 1997/12/05 · arxiv updated 2009/11/30

Abstract

I calculate the quark contributions to the axial and tensor charges and the spin structure of the proton. The result indicates that the valence current quark spins carry 1/3 of the proton spin, the total contribution of quark spins to the proton spin satisfies ΔΣ= 1/3 + ΔΣ_sea ≤ 1/3, and the quarks (their spin plus orbital contributions) contribute about one half of the proton spin at scale of 1 GeV. The valence current quark contributions to the proton tensor charge are also obtained.

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