Four-Point Spectral Functions and Ward Identities in Hot QED

We derive spectral representations for the different components of the 4-point function at finite temperature in the real time formalism in terms of five real spectral densities. We explicitly calculate all these functions in QED in the hard thermal loop approximation. The Ward identities obeyed by...

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Detalles Bibliográficos
Autores principales: Hou, De-fu, Carrington, M.E., Kobes, R., Heinz, Ulrich W.
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.61.085013
https://dx.doi.org/10.1103/PhysRevD.67.049902
http://cds.cern.ch/record/409516
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author Hou, De-fu
Carrington, M.E.
Kobes, R.
Heinz, Ulrich W.
author_facet Hou, De-fu
Carrington, M.E.
Kobes, R.
Heinz, Ulrich W.
author_sort Hou, De-fu
collection CERN
description We derive spectral representations for the different components of the 4-point function at finite temperature in the real time formalism in terms of five real spectral densities. We explicitly calculate all these functions in QED in the hard thermal loop approximation. The Ward identities obeyed by the 1-loop 3- and 4-point functions in real time and their spectral functions are derived. We compare our results with those derived previously in the imaginary-time formalism for retarded functions in hot QCD, and we discuss the generalization of our results to non-equilibrium situations.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
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spelling cern-4095162023-03-14T18:00:44Zdoi:10.1103/PhysRevD.61.085013doi:10.1103/PhysRevD.67.049902http://cds.cern.ch/record/409516engHou, De-fuCarrington, M.E.Kobes, R.Heinz, Ulrich W.Four-Point Spectral Functions and Ward Identities in Hot QEDParticle Physics - PhenomenologyWe derive spectral representations for the different components of the 4-point function at finite temperature in the real time formalism in terms of five real spectral densities. We explicitly calculate all these functions in QED in the hard thermal loop approximation. The Ward identities obeyed by the 1-loop 3- and 4-point functions in real time and their spectral functions are derived. We compare our results with those derived previously in the imaginary-time formalism for retarded functions in hot QCD, and we discuss the generalization of our results to non-equilibrium situations.We derive spectral representations for the different components of the 4-point function at finite temperature in the real time formalism in terms of five real spectral densities. We explicitly calculate all these functions in QED in the hard thermal loop approximation. The Ward identities obeyed by the 1-loop 3- and 4-point functions in real time and their spectral functions are derived. We compare our results with those derived previously in the imaginary-time formalism for retarded functions in hot QCD, and we discuss the generalization of our results to non-equilibrium situations.hep-ph/9911494CERN-TH-99-351CERN-TH-99-351oai:cds.cern.ch:4095161999-11-26
spellingShingle Particle Physics - Phenomenology
Hou, De-fu
Carrington, M.E.
Kobes, R.
Heinz, Ulrich W.
Four-Point Spectral Functions and Ward Identities in Hot QED
title Four-Point Spectral Functions and Ward Identities in Hot QED
title_full Four-Point Spectral Functions and Ward Identities in Hot QED
title_fullStr Four-Point Spectral Functions and Ward Identities in Hot QED
title_full_unstemmed Four-Point Spectral Functions and Ward Identities in Hot QED
title_short Four-Point Spectral Functions and Ward Identities in Hot QED
title_sort four-point spectral functions and ward identities in hot qed
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.61.085013
https://dx.doi.org/10.1103/PhysRevD.67.049902
http://cds.cern.ch/record/409516
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AT carringtonme fourpointspectralfunctionsandwardidentitiesinhotqed
AT kobesr fourpointspectralfunctionsandwardidentitiesinhotqed
AT heinzulrichw fourpointspectralfunctionsandwardidentitiesinhotqed

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