Hubble-induced mass from MSSM plasma

Masahiro Kawasaki, Fuminobu Takahashi, Tomohiro Takesako

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We evaluate the effective mass of a scalar field φ coupled to thermal plasma through Planck-suppressed interactions. We find it useful to rescale the coupled fields so that all the φ-dependences are absorbed into the yukawa and gauge couplings, which allows us to read off the leading order contributions to the effective mass mφ from the 2-loop free energy calculated with the rescaled couplings. We give an analytical expression for m φ at a sufficiently high temperature in the case where φ is coupled to the MSSM chiral superfields through non-minimal Kähler potential. We find that |mφ2| is about 10 -3H2 ∼ 10-2H2 at the leading order in terms of the couplings for typical parameter sets, where H is the Hubble expansion rate in the radiation-dominated era.

Original languageEnglish
Article number008
JournalJournal of Cosmology and Astroparticle Physics
Volume2013
Issue number4
DOIs
Publication statusPublished - 2013 Apr

Keywords

  • cosmology of theories beyond the SM
  • physics of the early universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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