3 papers
nucl-th1996
Pion-pair formation and the pion dispersion relation in a hot pion gas
T. Alm, G. Chanfray, P. Schuck +1
The possibility of pion--pair formation in a hot pion gas, based on the bosonic gap equation, is pointed out and discussed in detail. The critical temperature for condensation of p…
nucl-th1995
The Nucleon Spectral Function at Finite Temperature and the Onset of Superfluidity in Nuclear Matter
T. Alm, G. Roepke, A. Schnell +2
Nucleon selfenergies and spectral functions are calculated at the saturation density of symmetric nuclear matter at finite temperatures. In particular, the behaviour of these quant…
nucl-th1994
Critical Enhancement of the In-medium Nucleon-Nucleon Cross Section at low Temperatures
T. Alm, G. Roepke, M. Schmidt
The in-medium nucleon-nucleon cross section is calculated starting from the thermodynamic T-matrix at finite temperatures. The corresponding Bethe-Salpeter-equation is solved using…