Nuclear aspects of the solar neutrino problem

Details Nuclear aspects of the solar neutrino problem Nuclear aspects of the solar neutrino problem

1997-05-26

arxiv.org/abs/nucl-th/9705046v1

Astrophys.SpaceSci.258:133-144,1998

Physics

Nuclear Physics

Nuclear Theory

11 pages, LaTeX (uses kluwer.sty, included), plus 3 figures added as postscript files, to appear in Proceedings of the Sixth U

Scientific paper

10.1023/A:1001783223339

The present status of the nuclear reaction rates determining the solar neutrino flux is discussed. This includes the reaction rates for the two branching ratios of the three pp-chains involving the reactions 3He(3He,2p)4He and 3He(4He,gamma)7Be for the first branching, and 7Be(e-,nu_e)7Li and 7Be(p,gamma)7B for the second branching. Mainly we will concentrate on the basic nuclear reaction p + p -> D + e+ + nu_e of the pp-chains. We use a relativistic field theory model of the deuteron to calculate the low-energy cross section for this reaction. The theoretical prediction of the cross section obtained is about 2.9 times largerthan given in the conventional potential approach. The consequences of this new reaction rate for the solar neutrino problem will be presented and discussed.

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