Abstract
Using a plausible approximation for the normal-state vertex function, the strong-coupling corrections delta F/sub SC/ to the free energy of superfluid /sup 3/He are calculated. Delta F/sub SC/ is expressed in terms of the Fermi liquid scattering amplitudes A/sub 0/, A/sub 1/, B/sub 0/, and B/sub 1/ and the invariant combinations of the order parameter. Calculations are also performed for the jump in specific heat at T/sub c/ for the A/sub 1/, Balian-Werthamer (BW), and Anderson-Brinkman-Morel (ABM) states, the initial slope of the superfluid mass density and nuclear spin susceptibility in the BW and AMB states vs. T/T/sub c/ at T/sub c/, the initial slope of the T/sub AB/ line vs. pressure at the polycritical point, and the effect of a small magnetic field on the T/sub AB/ line. The calculated values of all the above properties are in reasonable agreement with the experimental ones.
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