Approximate Energy Expression for Nuclear Matter with Tensor Structure Functions

摘要

We refine the approximate energy expression for neutron matter by taking into ccount three-body cluster terms with tensor correlations. The energy expression is an explicit functional of two-hody distribution functions and used conveniently in the variational method. The energy expression proposed previously does not include kinetic energy terms caused by jioncentral correlations sufficiently, and the obtained energy is too low. In this study, we refine ihe energy expression by introducing the main part of the missing three-body cluster terms that are related to the tensor correlations. The refined energy expression automatically guarantees necessary conditions on tensor structure functions, The obtained energy per neutron with the fi'potential is considerably higher than that of the old energy expression.