B. Behera et al., MOMENTUM AND DENSITY-DEPENDENCE OF THE MEAN-FIELD IN NUCLEAR-MATTER, Journal of physics. G, Nuclear and particle physics (Print), 24(11), 1998, pp. 2073-2086
The momentum and density dependence of the mean field in nuclear matte
r has been studied with phenomenological effective interactions with p
articular emphasis on the influence of the functional form of the inte
raction in determining the high density and high momentum behaviour of
the mean field. Emphasis is also given to choosing the effective inte
raction in a form simple enough to permit analytical calculations of v
arious properties of nuclear matter with a minimum number of adjustabl
e parameters. These simple effective interactions are found to have a
zero-range density-dependent part similar to Skyrme interactions and a
long-range density-independent part of conventional form, such as Yuk
awa, Gaussian and exponential. It is observed that the high density an
d the high momentum behaviour of the mean field in nuclear matter is e
ssentially governed by the nature of the density dependence and the pr
ecise functional form of the long-range part of the exchange component
of the effective interaction. The parameters of these interactions ca
n be constrained to obtain a mean field in nuclear matter which is ind
ependent of the functional form of the exchange interaction in the ran
ge of momentum k = 0-5 fm(-1) and up to a density four times the stand
ard nuclear matter density. However, beyond this range the functional
form of the exchange interaction becomes important in determining the
momentum and density dependence of the mean field in nuclear matter.