2017/09/30 by Mayumi Aoki, Hiromitsu Goto, Jisuke Kubo · 1 citation
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.96.075045
published as Phys. Rev. D 96, 075045 (2017) · 31 pages, 16 figures; references added, version accepted in PRD
arxiv created 2017/11/07 · arxiv updated 2017/11/08
Drastic changes in the early universe such as first-order phase transition can produce a stochastic gravitational wave (GW) background. We investigate the testability of a scale invariant extension of the standard model (SM) using the GW background produced by the chiral phase transition in a strongly interacting QCD-like hidden sector, which, via a SM singlet real scalar mediator, triggers the electroweak phase transition. Using the Nambu--Jona-Lasinio method in a mean field approximation we estimate the GW signal and find that it can be tested by future space based detectors.