Solar neutrino processes in the relativistic field theory model of the deuteron

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The generalized version of the relativistic field theory model of the deuteron (RFMD) is applied to the description of processes of astrophysical interest and low-energy elastic NN scattering. The value of the astrophysical factor Spp(0) = 5.52x10⁻²⁵ MeV b is found to be enhanced by a factor of 1.42 with respect to the classical value S*pp(0) = 3.89x10-25 MeV b obtained by Kamionkowski and Bahcall in the potential model approach (PMA). The astrophysical aspects of this enhancement are discussed. The cross sections for the disintegration of the deuteron by (anti-) neutrinos nuₑ + D -> e- + p + p, anti-nuₑ + D -> e+ + n + n and nuₑ(anti-nuₑ) + D -> nuₑ(anti-nuₑ) + n + p are calculated for the energies of (anti-) neutrinos ranging from thresholds up to 10 MeV. The results are discussed in comparison with the PMA data. The cross sections for anti-nuₑ + D -> e+ + n + n and anti-nuₑ + D -> anti-nuₑ + n + p averaged over the reactor anti-neutrino energy spectrum agree well with experimental data. The astrophysical factor Spep(0) for the process p + e- + p -> nuₑ + D (or pep-process) is calculated relative to Spp(0) in complete agreement with the result obtained by Bahcall and May. The reaction rate for the neutron-proton radiative capture is calculated in agreement with the PMA result obtained for pure M1 transition. It is shown that in the RFMD one can describe low--energy elastic NN scattering in complete agreement with low-energy nuclear phenomenology.