Vacuum contributions in a chiral effective Lagrangian for nuclei
- Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
- Physics Department and Nuclear Theory Center, Indiana University, Bloomington, Indiana 47405 (United States)
A relativistic hadronic model for nuclear matter and finite nuclei, which incorporates nonlinear chiral symmetry and broken scale invariance, is presented and applied at the one-baryon-loop level to finite nuclei. The model contains an effective light scalar field that is responsible for the midrange nucleon-nucleon attraction and which has anomalous scaling behavior. One-loop vacuum contributions in this background scalar field at finite density are constrained by low-energy theorems that reflect the broken scale invariance of quantum chromodynamics. A mean-field energy functional for nuclear matter and nuclei is derived that contains small powers of the fields and their derivatives, and the validity of this truncation is discussed. Good fits to the bulk properties of finite nuclei and single-particle spectra are obtained.
- Research Organization:
- Indiana Univ., Bloomington, IN (United States)
- DOE Contract Number:
- FG02-87ER40365
- OSTI ID:
- 249480
- Journal Information:
- Physical Review, C, Vol. 52, Issue 3; Other Information: PBD: Sep 1995
- Country of Publication:
- United States
- Language:
- English
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