Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-12-14
Phys.Rev.Lett.105:262501,2010
Physics
Nuclear Physics
Nuclear Theory
4 pages, 4 figures; in press, Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.105.262501
Zero-range effective interactions are commonly used in nuclear physics and in other domains to describe many-body systems within the mean-field model. If they are used within a beyond-mean-field framework, contributions to the total energy that display an ultraviolet divergence are found. We propose a general strategy to regularize this divergence and we illustrate it in the case of the second-order corrections to the equation of state (EOF) of uniform symmetric matter. By setting a momentum cutoff $\Lambda$, we show that for every (physically meaningful) value of $\Lambda$ it is possible to determine a new interaction such that the EOS with the second-order corrections reproduces the empirical EOS, with a fit of the same quality as that obtained at the mean-field level.
Colò Gianluca
Giai Nguyen Van
Grasso Marcella
Moghrabi Kassem
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