Improved loop expansion for the effective potential of coupled boson-fermion systems at finite temperature and density
Journal Article
·
· Phys. Rev. D; (United States)
The effective potential V(phi) of a scalar field theory coupled to fermions is undefined near phi = 0 if the scalar field has a spontaneously broken symmetry. This shows up in a loop expansion as an imaginary part in V(phi) which persists to all temperatures and densities, even when the symmetry is restored. This paper presents a modification of the loop expansion which yields a real V(phi) whenever the one-loop fermion corrections restore the symmetry.
- Research Organization:
- Department of Physics, University of British Columbia, Vancouver, British Columbia V6T 1W5
- OSTI ID:
- 6299059
- Journal Information:
- Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 27:4; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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