Theoretical evaluation of solar proton-proton fusion reaction rate and its uncertainties

The weak proton-proton fusion into a deuteron (2H) is the driving reaction in energy production Sun, as well similar main sequence stars. Its rate solar interior determined only theoretically. Here, we provide new determination of this conditions S11(0), and analyze theoretical experimental sources for uncertainties, using effective field theory Quantum Chromodynamics without explicit pions at next-to-leading order. This prediction procedure verified validated experimentally measured set electromagnetic reactions, which show to be analogous their operator structure properties sector, are reproduced within assessed uncertainty, same approach. We find an enhancement S11 by 1−4% over previously recommended value. change reduces calculated fluxes neutrinos originating 8B 7Be nuclear reactions thus favoring higher abundances metallic photospheric elements, tension between different composition determination, known “Solar Composition Problem”.