Assessing perturbativity and vacuum stability in high-scale leptogenesis
Journal Article
·
· Journal of High Energy Physics (Online)
- Univ. of California, Irvine, CA (United States)
- Durham University (United Kingdom)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
We consider the requirements that all coupling constants remain perturbative and the electroweak vacuum metastable up to the Planck scale in high-scale thermal leptogenesis, in the context of a type-I seesaw mechanism. We find a large region of the model parameter space that satisfies these conditions in combination with producing the baryon asymmetry of the Universe. We demonstrate these conditions require $${\rm Tr}[Y_N^\dagger Y_N] \lesssim 0.66$$ on the neutrino Yukawa matrix. We also investigate this scenario in the presence of a large number $$N_F$$ of coloured Majorana octet fermions in order to make quantum chromodynamics asymptotically safe in the ultraviolet.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1462109
- Report Number(s):
- arXiv:1806.00460; IPPP/18/40; FERMILAB-PUB-18-222-T; UCI-TR-2018-05; IPPP-18-40; 1676110; TRN: US1902106
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2018, Issue 12; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Testing the Seesaw Mechanism and Leptogenesis with Gravitational Waves
|
text | January 2020 |
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