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Author Margulies, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword Physics (Theoretical)-Quantum Field Theories ♦ Physics (Nuclear)-Nuclear Theory-Nuclear Structure ♦ FERMI GAS- ENERGY ♦ LAGRANGIAN FIELD THEORY- SIGMA MODEL ♦ NUCLEAR STRUCTURE ♦ INFRARED DIVERGENCES ♦ NUCLEAR MATTER ♦ PSEUDOSCALAR MESONS ♦ SCALAR FIELDS ♦ SCALAR MESONS ♦ SYMMETRY BREAKING
Abstract The energy density of a system of fermion fields interacting with scalar and pseudoscalar fields in the presence of an external source linearly coupled to the scalar field is calculated. This is done by expanding the energy density in a sum of loop diagrams. The quantity computed is of direct interest for the study of the possible existence of abnormal nuclear states, first hypothesized by Lee and Wick. It may also be of relevance to other outstanding problems in hadron physics. The calculation is done within the context of a theory which exhibits spontaneous symmetry breaking at the tree level. The method used is designed with the goal in mind of retaining in the final answer the symmetry originally present in the Lagrangian density L, and explicitly shows how to avoid the infrared difficulties associated with the presence of a massless fermion field in L. (AIP)
Educational Use Research
Learning Resource Type Article
Publisher Date 1976-03-15
Publisher Place United States
Journal Phys. Rev., D
Volume Number 13
Issue Number 6
Organization Columbia University, New York, New York 10027


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