Gravitational waves as a probe of the SUSY scale

Ayuki Kamada, Masaki Yamada

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We investigate the sources of the Hubble-induced mass for a flat direction in supersymmetric theories and show that the sign of the Hubble-induced mass generally changes just after the end of inflation. This implies that global cosmic strings generally form after the end of inflation in a wide class of supersymmetric models, including the minimal supersymmetric Standard Model. The cosmic strings emit gravitational waves whose frequency corresponds to the Hubble scale, until they disappear when the Hubble parameter decreases down to the soft mass of the flat direction. As a result, the peak frequency of gravitational waves is related to the supersymmetric scale. The observation of this gravitational wave signal, in conjunction with results from collider experiments and dark matter searches, can yield information of supersymmetry-breaking parameters.

Original languageEnglish
Article number063529
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number6
DOIs
Publication statusPublished - 2015 Mar 24
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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