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SU(3) symmetry breaking in hyperon semileptonic decays

Ruben Flores-Mendieta·Elizabeth Jenkins·Aneesh V. Manohar
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Abstract

Flavor SU(3) symmetry breaking in the hyperon semileptonic decay form-factors is analyzed using the 1/N expansion. A detailed comparison with experimental data shows that corrections to f_1 are approximately 10%, which agrees with theoretical expectations. Corrections to g_1 are compatible with first-order symmetry breaking. A fit to the experimental data allows one to predict the g_1 form factor for Xi^0 -> Sigma^+ decay. The proton matrix element of the T^8 component of the axial current (which is equal to 3F-D in the SU(3) symmetry limit) is found to be approximately 0.34.

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Ruben Flores-Mendieta, Elizabeth Jenkins, Aneesh V. Manohar. 1998-07-09. SU(3) symmetry breaking in hyperon semileptonic decays. https://doi.org/10.1103/physrevd.58.094028

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