Solar neutrino fluxes with arbitrary 3He mixing -: art. no. 123002

The He-3 abundance is not constrained by helioseismic data. Mixing of He-3 inside the solar core by processes not included in the solar standard model (SSM) has been recently proposed as a possible solution to the solar neutrino problem. We have performed a model-independent analysis of solar neutrino fluxes using practically arbitrary He-3 mixing. In addition, we have been simultaneously varying within very wide ranges the temperature in the neutrino production zone and the astrophysical factors S-17 and S-34 of the p + Be-7 and He-3+He-4 cross sections. Seismic data are used as constraints, but the solar-luminosity constraint is not imposed. It is demonstrated that even allowing 3He abundances higher by factors up to 16 than in the SSM, temperatures 5% (or more) lower, the astrophysical factor S-17 UP to 40% higher, and varying S34 in the range (-20%,+ 40%), the best fit is still more than 5 sigma away from the observed fluxes. We conclude that practically arbitrary 3He mixing combined with independent variations of temperature and cross sections cannot explain the observed solar neutrino fluxes. [S0556-2821(99)04622-6].