Scalar trapping and Saxion cosmology

Takeo Moroi, Kyohei Mukaida, Kazunori Nakayama, Masahiro Takimoto

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We study in detail the dynamics of a scalar field in thermal bath with symmetry breaking potential. In particular, we focus on the process of trapping of a scalar field at an enhanced symmetry point through the thermal/non-thermal particle production, taking into account the interactions of produced particles with the standard model particles. As an explicit example, we revisit the saxion dynamics with an initial amplitude much larger than the Peccei-Quinn scale and show that the saxion trapping phenomenon happens for the most cases and it often leads to thermal inflation. We also study the saxion dynamics after thermal inflation, and it is shown that thermal dissipation effect on the saxion can relax the axion overproduction problem from the saxion decay.

Original languageEnglish
Article number40
JournalJournal of High Energy Physics
Issue number6
Publication statusPublished - 2013
Externally publishedYes


  • Cosmology of Theories beyond the SM
  • Supersymmetric Standard Model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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