Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-08-27
Physics
High Energy Physics
High Energy Physics - Phenomenology
Talk given at TFT'98, Regensburg (Germany), August 10-14 1998. 10 pages, no figures, RevTeX twocolumns. References added
Scientific paper
Thermal superspace is characterized by Grassmann variables which are time-dependent and antiperiodic in imaginary time, with a period given by the inverse temperature. The thermal superspace approach allows to define thermal superfields obeying consistent boundary conditions and to formulate a ``super-KMS'' condition for superfield propagators. Upon constructing thermal covariantizations of the superspace derivative operators, we define thermal covariant derivatives and provide a definition of thermal chiral and antichiral superfields. Thermal covariantizations of the generators of the super-Poincar\'e algebra are also constructed, and the thermal supersymmetry algebra is computed; it has the same structure as at T=0. We then investigate realizations of this thermal supersymmetry algebra on systems of thermal fields. In doing so, we observe thermal supersymmetry breaking in terms of the lifting of the mass degeneracy, and of the non-invariance of the thermal action.
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