Realistic Calculation of the hep Astrophysical Factor

Details Realistic Calculation of the hep Astrophysical Factor Realistic Calculation of the hep Astrophysical Factor

2000-03-29

arxiv.org/abs/nucl-th/0003065v1

Phys.Rev.Lett.84:5959,2000

Physics

Nuclear Physics

Nuclear Theory

8 pages RevTex file, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.84.5959

The astrophysical factor for the proton weak capture on 3He is calculated with correlated-hyperspherical-harmonics bound and continuum wave functions corresponding to a realistic Hamiltonian consisting of the Argonne v18 two-nucleon and Urbana-IX three-nucleon interactions. The nuclear weak charge and current operators have vector and axial-vector components, that include one- and many-body terms. All possible multipole transitions connecting any of the p-3He S- and P-wave channels to the 4He bound state are considered. The S-factor at a p-3He center-of-mass energy of 10 keV, close to the Gamow-peak energy, is predicted to be 10.1 10^{-20} keV b, a factor of five larger than the standard-solar-model value. The P-wave transitions are found to be important, contributing about 40 % of the calculated S-factor.

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