OBEP and eikonal form factor (II). Nuclear matter results

Details OBEP and eikonal form factor (II). Nuclear matter results OBEP and eikonal form factor (II). Nuclear matter results

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976nupha.256..497h&link_type=abstract

Nuclear Physics A, Volume 256, Issue 3, p. 497-508.

Physics

Nuclear Physics

13

Scientific paper

Nuclear matter properties are calculated in a first-order Brueckner-Bethe calculation using a one-boson exchange potential recently proposed by the authors, in which the phenomenological cutoff of dipole type used so far has been replaced by a form factor obtained from an eikonal approximation to multiple vector meson exchange processes. We find -23.5 MeV saturation energy at a Fermi momentum kF = 1.77 fm-1, i.e. about 12 MeV more binding than realistic OBEP using dipole-type cutoffs and about 8 MeV overbinding compared to the empirical value of 16 MeV. On the other hand, estimates suggest that, compared to the Reid soft-core potential, this new OBEP predicts about 1.5 MeV more binding in the case of the triton and about 4 MeV more binding in the case of 16O, i.e. gives nearly the correct empirical result. The additional binding is traced back to the small deuteron D-state probability of 4.32% predicted by this OBEP, which is a consequence of the special structure of the eikonal form factor. However, taking the effect of the Δ-resonance into account recently given by Green and Niskanen, one arrives at -14 MeV saturation energy for nuclear matter at kF = 1.36 fm-1, whereas the results for the triton and 16O are changed to a negligible extent only.
Work supported in part by the Deutsche Forschungsgemeinschaft.

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