Determination of the strange form factors of the nucleon from νp, (ν)over-barp, and parity-violating (e)over-right-arrowp elastic scattering -: art. no. 082002

A new method of obtaining the strange form factors of the nucleon is presented, in which forward-angle parity-violating (e) over right arrowp elastic scattering data are combined with nup and (ν) over barp elastic scattering data to extract all three strange form factors: electric, magnetic, and axial (G(E)(s), G(M)(s), and G(A)(s)). In this Letter, nup and (ν) over barp data from the Brookhaven E734 experiment are combined with the Jefferson Laboratory HAPPEX (e) over right arrowp data to obtain two distinct solutions for the strange form factors at Q(2)=0.5 GeV2. More generally, combining the neutrino elastic scattering data from E734 with the existing and upcoming (e) over right arrowp data will yield the strange form factors of the nucleon for Q(2) of 0.45-1.05 GeV2. Measurement of G(A)(s) is crucial to the determination of the strange quark contribution to the nucleon spin Deltas.