Nonextensive statistics in stellar plasma and solar neutrinos

Nonextensive and quantum uncertainty effects (related to the quasiparticles composing the stellar core) have strong influence on the nuclear rates and , of course, affect solar neutrino fluxes. Both effects do coexist and are due to the frequent collisions among the ions. The weakly nonextensive natu re of the solar core is confirmed. The range of predictions for the neutrin o fluxes is enlarged and the solar neutrino problem becomes less dramatic.