Precision measurements of the nucleon strange form factors at Q2∼0.1 GeV2

We report new measurements of the parity-violating asymmetry A(PV) in elastic scattering of 3 GeV electrons off hydrogen and He-4 targets with approximate to 6.0 degrees. The He-4 result is A(PV) = (+6.40 +/- 0.23(stat) +/- 0.12(syst)) x 10(-6). The hydrogen result is A(PV) = (-1.58 +/- 0.12(stat) +/- 0.04(syst)) x 10(-6). These results significantly improve constraints on the electric and magnetic strange form factors G(E)(s) and G(M)(s). We extract G(E)(s) = 0.002 +/- 0.014 +/- 0.007 at < Q(2)> = 0.077 GeV2, and G(E)(s) + 0.09G(M)(s) = 0.007 +/- 0.011 +/- 0.006 at < Q(2)> = 0.109 GeV2, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.