Gravitational waves from the minimal gauged $U(1)_{B-L}$ model. (arXiv:1904.03020v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Hasegawa_T/0/1/0/all/0/1">Taiki Hasegawa</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Okada_N/0/1/0/all/0/1">Nobuchika Okada</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Seto_O/0/1/0/all/0/1">Osamu Seto</a>
An additional $U(1)$ gauge interaction is one of promising extensions of the
standard model of particle physics. Among others, the $U(1)_{B-L}$ gauge
symmetry is particularly interesting because it addresses the origin of
Majorana masses of right-handed neutrinos, which naturally leads to tiny light
neutrino masses through the seesaw mechanism. We show that, based on the
minimal $U(1)_{B-L}$ model, the symmetry breaking of the extra $U(1)$ gauge
symmetry with its minimal Higgs sector in the early Universe can exhibit the
first-order phase transition and hence generate a large enough amplitude of
stochastic gravitational wave radiation which is detectable in future
experiments.
An additional $U(1)$ gauge interaction is one of promising extensions of the
standard model of particle physics. Among others, the $U(1)_{B-L}$ gauge
symmetry is particularly interesting because it addresses the origin of
Majorana masses of right-handed neutrinos, which naturally leads to tiny light
neutrino masses through the seesaw mechanism. We show that, based on the
minimal $U(1)_{B-L}$ model, the symmetry breaking of the extra $U(1)$ gauge
symmetry with its minimal Higgs sector in the early Universe can exhibit the
first-order phase transition and hence generate a large enough amplitude of
stochastic gravitational wave radiation which is detectable in future
experiments.
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