Ghostbusters in f (R) supergravity

Toshiaki Fujimori, Muneto Nitta, Keisuke Ohashi, Yusuke Yamada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

f (R) supergravity is known to contain a ghost mode associated with higher-derivative terms if it contains Rn with n greater than two. We remove the ghost in f (R) supergravity by introducing auxiliary gauge field to absorb the ghost. We dub this method as the ghostbuster mechanism [1]. We show that the mechanism removes the ghost super-multiplet but also terms including Rn with n ≥ 3, after integrating out auxiliary degrees of freedom. For pure supergravity case, there appears an instability in the resultant scalar potential. We then show that the instability of the scalar potential can be cured by introducing matter couplings in such a way that the system has a stable potential.

Original languageEnglish
Article number102
JournalJournal of High Energy Physics
Volume2018
Issue number5
DOIs
Publication statusPublished - 2018 May 1

Keywords

  • Supergravity Models
  • Supersymmetric Effective Theories

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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