Infrared behavior of the dispersion relations in high-temperature scalar QED

Abdessamad Abada, Karima Bouakaz

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We investigate the infrared properties of the next-to-leading-order dispersion relations in scalar quantum electrodynamics at high temperature in the context of hard-thermal-loop perturbation theory. Specifically, we determine the damping rate and the energy for scalars with ultrasoft momenta. We show by explicit calculations that an early external-momentum expansion, before the Matsubara sum is performed, gives exactly the same result as a late one. The damping rate is obtained up to fourth order included in the ultrasoft momentum and the energy up to second order. The damping rate is found sensitive in the infrared whereas the energy is not.

Original languageEnglish
Pages (from-to)4067-4092
Number of pages26
JournalJournal of High Energy Physics
Issue number1
Publication statusPublished - 2006


  • NLO Computations
  • Thermal Field Theory

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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