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arXiv · 1011.0139

Spin of ground state baryons

A. J. Buchmann·E. M. Henley
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Abstract

We calculate the quark spin contribution to the total angular momentum of flavor octet and flavor decuplet ground state baryons using a spin-flavor symmetry based parametrization method of quantum chromodynamics. We find that third order SU(6) symmetry breaking three-quark operators are necessary to explain the experimental result Sigma_1=0.32(10). For spin 3/2 decuplet baryons we predict that the quark spin contribution is Sigma_3=3.93(22), i.e. considerably larger than their total angular momentum.

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A. J. Buchmann, E. M. Henley. 2010-10-31. Spin of ground state baryons. https://doi.org/10.1103/physrevd.83.096011

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