Hot nucleons in chiral soliton models
- Fachbereich Physik, Universitaet-GH-Siegen, D-57068 Siegen (Germany)
Nucleons in a hot pion gas are studied within the framework of chiral soliton models which contain pions and also baryons as solitons of the same chiral action. The semiclassical treatment of the soliton solutions must be augmented by pionic fluctuations which requires renormalization to one loop, and finite temperatures do not introduce new ultraviolet divergencies and may easily be considered. Alternatively, a renormalization scheme based on the renormalization group equation at finite temperature comprises and extends the rigorous results of chiral perturbation theory and renders the low-energy constants temperature dependent, which allows the construction of temperature-dependent solitons below the critical temperature. The temperature dependence of the baryon energy and the pion-nucleon coupling is studied. There is no simple scaling law for the temperature dependence of these quantities. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 542742
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 56; ISSN 0556-2821; ISSN PRVDAQ
- Country of Publication:
- United States
- Language:
- English
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