Borboruah, Zafri A;
Deppisch, Frank F;
Ghoshal, Anish;
Malhotra, Lekhika;
(2025)
Inflationary gravitational waves and laboratory searches as complementary probes of right-handed neutrinos.
Physical Review D
, 112
(5)
, Article 056003. 10.1103/qyld-mf33.
Preview |
Text
Deppisch_Inflationary gravitational waves and laboratory searches as complementary probes of right-handed neutrinos_VoR.pdf Download (3MB) | Preview |
Abstract
We analyze the damping of inflationary gravitational waves (GW) that re-enter the Hubble horizon before or during a post inflationary era dominated by a metastable right-handed neutrino (RHN), whose out-of-equilibrium decay releases entropy. Within a minimal type-I seesaw extension of the Standard Model, we explore the conditions under which the population of thermally produced RHNs remain long-lived and cause a period of matter domination. We find that the suppression of the GW spectrum occurs above a characteristic frequency determined by the RHN mass and active-sterile mixing. For RHN masses in the range 0.1–10 GeV and mixing 10−12 ≲|
| Type: | Article |
|---|---|
| Title: | Inflationary gravitational waves and laboratory searches as complementary probes of right-handed neutrinos |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/qyld-mf33 |
| Publisher version: | https://doi.org/10.1103/qyld-mf33 |
| Language: | English |
| Additional information: | © 2025 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10216905 |
Archive Staff Only
 |
View Item |
