Hard thermal loops and beyond in the finite temperature world-line formulation of QED
We derive the hard thermal loop action for soft electromagnetic fields in the finite temperature world-line formulation at imaginary time by first integrating out the hard fermion modes from the microscopic QED action. Further, using the finite T world-line method, we calculate all static higher order terms in the soft electromagnetic field. At high T, the leading non-linear terms are independent of the temperature and, except for a term quartic in the time component of the vector potential, they cancel exactly against the vacuum contribution. The remaining T-dependent non-linear terms become more strongly suppressed by the temperature as the number of soft fields increases, thus making the expansion reliable.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203123
- Journal Information:
- Physical Review D, Vol. 63, Issue 12; Other Information: DOI: 10.1103/PhysRevD.63.125022; Othernumber: PRVDAQ000063000012125022000001; 002114PRD; PBD: 15 Jun 2001; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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