Speaker
Description
Revealing dynamics of the electroweak phase transition is essential
for probing new physics at the early Universe
such as electroweak baryogenesis,
which requires strongly first order phase transition.
We compute the spectrum of gravitational waves from
first order phase transition in models with additional
isospin singlet scalars with and without classical scale invariance,
and in the extended Higgs model with a real singlet.
Predicted deviations in various Higgs boson couplings are also evaluated.
We show that these models can be tested by
the synergy of the measurements of the Higgs boson couplings at the LHC,
the measurement of the triple Higgs boson coupling at
future electron-positron colliders and the observation of
gravitational waves at future interferometers such as eLISA and DECIGO.
This talk is based on
Kakizaki, Kanemura, Matsui, PRD92 (2015) no.11,115007;
Hashino, Kakizaki, Kanemura, Matsui, PRD94 (2016) no.1, 015005;
Hashino, Kakizaki, Kanemura, Ko, Matsui, arXiv:1609.00297.
