We investigate the effect of extra singlets on the electroweak phase transition (EWPT) strength and the spectrum of the corresponding gravitational waves (GWs). We consider here the standard model (SM) extended with a singlet scalar with multiplicity N coupled to the SM Higgs doublet. After imposing all the theoretical and experimental constraints and defining the region where the EWPT is strongly first order, we obtain the region in which the GWs spectrum can be reached by different future experiments such as LISA and DECIGO.
@article{arxiv.1809.09883,
title = {Gravitational Waves from Phase Transitions in Models with Charged Singlets},
author = {Amine Ahriche and Katsuya Hashino and Shinya Kanemura and Salah Nasri},
journal= {arXiv preprint arXiv:1809.09883},
year = {2018}
}