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Causal amplitudes in the Schwinger model at finite temperature

Ashok Das1,2,*, R. R. Francisco3, and J. Frenkel3,†

  • 1Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627-0171, USA
  • 2Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta 700064, India
  • 3Instituto de Física, Universidade de São Paulo, 05508-090, São Paulo, São Paulo, Brazil

  • *das@pas.rochester.edu
  • †jfrenkel@fma.if.usp.br
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Phys. Rev. D 86, 047702 – Published 7 August, 2012

DOI: https://doi.org/10.1103/PhysRevD.86.047702

Abstract

We show, in the imaginary time formalism, that the temperature dependent parts of all the retarded (advanced) amplitudes vanish in the Schwinger model. We trace this behavior to the CPT invariance of the theory and give a physical interpretation of this result in terms of forward scattering amplitudes of on-shell thermal particles.

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References (16)

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Phys. Rev. D 86, 047702– Published 7 August, 2012
  • Received 25 June 2012

© 2012 American Physical Society

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