Do solar-neutrino experiments imply new physics?

None of the 1000 solar models in a full Monte Carlo simulation is consistent with the results of the chlorine or the Kamiokande experiments. Even if the solar models are forced artificially to have a ${}_{}{}^8{}_{}{}^{}\mathrm{B}$ neutrino flux in agreement with the Kamiokande experiment, none of the fudged models agrees with the chlorine observations. The GALLEX and SAGE experiments, which currently have large statistical uncertainties, differ from the predictions of the standard solar model by $2\sigma$ and $3\sigma$, respectively.