The short-range correlation of asymmetric nucleonic matter at finite temperature: The LOCV approach

Abstract

The short-range correlation of the asymmetric nucleonic matter (ASM) is perused at finite temperature in the lowest order constrained variational (LOCV) method. It is observed that, by increasing the temperature, the LOCV ASM static non-central distribution functions become weak. For small inter-particle distances, a universal behavior is found for the LOCV ASM state-dependent density distributions. Using the expectation value of the one-pion exchange part of the AV18 interaction, the scaling factor of the pion absorption cross section (the number of quasideuterons), for the different proton to neutron ratios R, is also estimated in the LOCV formalism. It is shown that, by increasing (decreasing) the ratio R (the temperature), the number of quasideuterons grows. Considering the scaling factor, the Bethe-Levinger (BL) factor for the ASM is also investigated. It is demonstrated that, at the saturation density and temperature 20 MeV, the BL factor for the ASM with R=1(0.5) becomes 4.3 (4.5).