Phase transitions in the NMSSM

Koichi Funakubo, Shuichiro Tao, Fumihiko Toyoda

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)


We study phase transitions in the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with the weak scale vacuum expectation values of the singlet scalar, constrained by Higgs spectrum and vacuum stability. We find four different types of phase transitions, three of which have two-stage nature. In particular, one of the two-stage transitions admits strongly first order electroweak phase transition, even with heavy squarks. We introduce a tree-level explicit CP violation in the Higgs sector, which does not affect the neutron electric dipole moment. In contrast to the MSSM with the CP violation in the squark sector, a strongly first order phase transition is not so weakened by this CP violation.

Original languageEnglish
Pages (from-to)369-389
Number of pages21
JournalProgress of Theoretical Physics
Issue number2
Publication statusPublished - Aug 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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