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A new method of obtaining the strange form factors of the nucleon ispresented, in which forward-angle parity-violating $\vec{e}p$ elasticscattering data is combined with $\nu p$ and $\bar{\nu} p$ elastic scatteringdata. The axial form factor in electron-nucleon scattering is complicated bythe presence of electro-weak radiative corrections that in principle need to becalculated or separately measured, but this axial form factor is suppressed atforward angles. The neutrino data has no such complication. Hence the use offorward-angle parity-violating $\vec{e}p$ data with $\nu p$ and $\bar{\nu} p$data allows the extraction of all three strange form factors: electric,magnetic and axial ($G_E^s$, $G_M^s$, and $G_A^s$). In this letter, $\nu p$ and$\bar{\nu} p$ data from the Brookhaven E734 experiment are combined with theJefferson Lab HAPPEX $\vec{e}p$ data to obtain two distinct solutions for thestrange form factors at $Q^2$ = 0.5 GeV$^2$. More generally, combining theneutrino elastic scattering data from E734 with the existing and upcoming$\vec{e}p$ data will yield the strange form factors of the nucleon for $Q^2$ of0.45-1.05 GeV$^2$. Measurement of $G_A^s$ is crucial to the determination ofthe strange quark contribution to the nucleon spin, $\Delta s$.Comment: 4 pages, 3 figures, 2 tables; to be submitted to Physical Review  Letter

physical review letters

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Determination of the Strange Form Factors of the Nucleon fromνp,ν¯p, and Parity-Violatinge<…