期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP05(2021)211
关键词
Cosmology of Theories beyond the SM; CP violation; Neutrino Physics
资金
- Newton International Fellowship [NIF 171202]
- European Structural and Investment Fund
- Czech Ministry of Education, Youth and Sports [MSCA-IF IV FZU-CZ.02.2.69/0.0/0.0/20_079/0017754]
Studies have shown that the quantum effects of right-handed neutrinos in a gravitational background facilitate the leptogenesis mechanism, which can be probed complementarily by GW detectors and next-generation neutrinoless double beta decay experiments. Successful leptogenesis should correspond to specific plane limits, while recent pulsar timing data could be related to the results of 0νββ decay experiments.
In seesaw mechanism, if right handed (RH) neutrino masses are generated dynamically by a gauged U(1) symmetry breaking, a stochastic gravitational wave background (SGWB) sourced by a cosmic string network could be a potential probe of leptogenesis. We show that the leptogenesis mechanism that facilitates the dominant production of lepton asymmetry via the quantum effects of right-handed neutrinos in gravitational background, can be probed by GW detectors as well as next-generation neutrinoless double beta decay (0 nu beta beta) experiments in a complementary way. We infer that for a successful leptogenesis, an exclusion limit on f - Omega (GW)h(2) plane would correspond to an exclusion on the |m(beta beta)| - m(1) plane as well. We consider a normal light neutrino mass ordering and discuss how recent NANOGrav pulsar timing data (if interpreted as GW signal) e.g., at 95% CL, would correlate with the potential discovery or null signal in 0 nu beta beta decay experiments.
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