Probing leptogenesis and pre-BBN universe with gravitational waves spectral shapes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554713" target="_blank" >RIV/68378271:_____/21:00554713 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0329375" target="_blank" >http://hdl.handle.net/11104/0329375</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP11(2021)017" target="_blank" >10.1007/JHEP11(2021)017</a>

Result language
angličtina
Original language name
Probing leptogenesis and pre-BBN universe with gravitational waves spectral shapes
Original language description
On the frequency-amplitude plane, Gravitational Waves (GWs) from cosmic strings show a flat plateau at higher frequencies due to the string loop dynamics in standard radiation dominated post-inflationary epoch. The spectrum may show an abrupt upward or a downward trend beyond a turning point frequency f∗_{*}∗, if the primordial dark age prior to the Big Bang Nucleosynthesis (BBN), exhibits non-standard cosmic histories. We argue that such a spectral break followed by a rising GW amplitude which is a consequence of a post-inflationary equation of state (ω > 1/3) stiffer than the radiation (ω = 1/3), could also be a strong hint of a leptogenesis in the seesaw model of neutrino masses. Dynamical generation of the right handed (RH) neutrino masses by a gauged U(1) symmetry breaking leads to the formation of a network of cosmic strings which emits stochastic GWs.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/EF20_079%2F0017754" target="_blank" >EF20_079/0017754: International mobility MSCA-IF IV FZU</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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