Contributions of strange quarks to the magnetic moment of the proton

Details Contributions of strange quarks to the magnetic moment of the proton Contributions of strange quarks to the magnetic moment of the proton

1997-01-04

arxiv.org/abs/nucl-th/9701008v1

Physics

Nuclear Physics

Nuclear Theory

Latex, 10 pages, 2 Postscript figures, uses epsf.sty

Scientific paper

Using the Gerasimov-Drell-Hearn sum rule and experimental total cross sections for photoproduction of $\eta$, $K$ and $\phi$ mesons on the proton, we obtain upper bounds for the contribution of strange quarks to the anomalous magnetic moment of the proton, $|\kappa_{s}| \le 0.20 \kappa_{p}$. The proposed experiments to measure the spin-dependence of the absorption cross section are expected to lower these bounds considerably. The existing data on $\eta$ production and phenomenological models for $K$ production agree with a negative sign for $\kappa_{s}$.

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