Self-consistent calculations of spectral densities in the model: improving the Hartree–Fock approximation by including nonzero decay widths
نویسندگان
چکیده
منابع مشابه
Improving the Hartree-Fock approximation by including nonzero decay widths
We studied the linear sigma model withO(N) symmetry at nonzero temperature in the framework of the CornwallJackiw-Tomboulis formalism [1, 2]. Extending the set of two-particle irreducible diagrams by adding sunset diagrams to the usual Hartree-Fock contributions, we derived a new approximation scheme which extends the standard Hartree-Fock approximation by the inclusion of nonzero decay widths....
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2006
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2006.05.007