THE IMAGINARY PART OF THE NUCLEON SELF-ENERGY IN HOT NUCLEAR MATTER
Luis Alvarez-RusoDepartamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Valencia, SpainPedro Fernández de CórdobaDepartamento de Matemática Aplicada, Universidad Politécnica de Valencia, Valencia, SpainE. OsetDepartamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
1996en
ABI
Аннотация
A semiphenomenological approach to the nucleon self-energy in nuclear matter at finite temperatures is followed. It combines elements of Thermo Field Dynamics for the treatment of finite temperature with a model for the self-energy, which evaluates the second order diagrams taking the needed dynamics of the NN interaction from experiment. The approach proved to be accurate at zero temperature to reproduce Im(Sigma) and other properties of nucleons in matter. In the present case we apply it to determine Im(Sigma) at finite temperatures. An effective NN cross section is deduced which can be easily used in analyses of heavy ion reactions.
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