Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum
The dynamical generation of right-handed-neutrino (RHN) masses in the early Universe naturally entails the formation of cosmic strings that give rise to an observable signal in gravitational waves (GWs). In this paper, we show that a characteristic break in the GW spectrum would provide evidence for...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-12-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.043321 |
| _version_ | 1797211145222750208 |
|---|---|
| author | Simone Blasi Vedran Brdar Kai Schmitz |
| author_facet | Simone Blasi Vedran Brdar Kai Schmitz |
| author_sort | Simone Blasi |
| collection | DOAJ |
| description | The dynamical generation of right-handed-neutrino (RHN) masses in the early Universe naturally entails the formation of cosmic strings that give rise to an observable signal in gravitational waves (GWs). In this paper, we show that a characteristic break in the GW spectrum would provide evidence for a nonstandard stage in the cosmological expansion history and a suppression of the RHN mass scale compared to the scale of spontaneous symmetry breaking. The detection of such a spectral feature would thus represent a unique possibility to probe the physics of RHN mass generation in regions of parameter space that allow for low-scale leptogenesis in accord with electroweak naturalness. |
| first_indexed | 2024-04-24T10:21:50Z |
| format | Article |
| id | doaj.art-9c223814b49541d98ff5a986227a2746 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:21:50Z |
| publishDate | 2020-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-9c223814b49541d98ff5a986227a27462024-04-12T17:04:43ZengAmerican Physical SocietyPhysical Review Research2643-15642020-12-012404332110.1103/PhysRevResearch.2.043321Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrumSimone BlasiVedran BrdarKai SchmitzThe dynamical generation of right-handed-neutrino (RHN) masses in the early Universe naturally entails the formation of cosmic strings that give rise to an observable signal in gravitational waves (GWs). In this paper, we show that a characteristic break in the GW spectrum would provide evidence for a nonstandard stage in the cosmological expansion history and a suppression of the RHN mass scale compared to the scale of spontaneous symmetry breaking. The detection of such a spectral feature would thus represent a unique possibility to probe the physics of RHN mass generation in regions of parameter space that allow for low-scale leptogenesis in accord with electroweak naturalness.http://doi.org/10.1103/PhysRevResearch.2.043321 |
| spellingShingle | Simone Blasi Vedran Brdar Kai Schmitz Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum Physical Review Research |
| title | Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum |
| title_full | Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum |
| title_fullStr | Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum |
| title_full_unstemmed | Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum |
| title_short | Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum |
| title_sort | fingerprint of low scale leptogenesis in the primordial gravitational wave spectrum |
| url | http://doi.org/10.1103/PhysRevResearch.2.043321 |
| work_keys_str_mv | AT simoneblasi fingerprintoflowscaleleptogenesisintheprimordialgravitationalwavespectrum AT vedranbrdar fingerprintoflowscaleleptogenesisintheprimordialgravitationalwavespectrum AT kaischmitz fingerprintoflowscaleleptogenesisintheprimordialgravitationalwavespectrum |