| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Cosmology in Mirror Twin Higgs and Neutrino Masses | Zackaria Chacko
; Nathaniel Craig
; Patrick J. Fox
; Roni Harnik
; | Date: |
23 Nov 2016 | Abstract: | We explore a simple solution to the cosmological challenges of the original
Mirror Twin Higgs (MTH) model that leads to interesting implications for
experiment. We consider theories in which both the standard model and mirror
neutrinos acquire masses through the familiar seesaw mechanism, but with a low
right-handed neutrino mass scale of order a few GeV. In these $
u$MTH models,
the right-handed neutrinos leave the thermal bath while still relativistic. As
the universe expands, these particles eventually become nonrelativistic, and
come to dominate the energy density of the universe before decaying. Decays to
standard model states are preferred, with the result that the visible sector is
left at a higher temperature than the twin sector. Consequently the
contribution of the twin sector to the radiation density in the early universe
is suppressed, allowing the current bounds on this scenario to be satisfied.
However, the energy density in twin radiation remains large enough to be
discovered in future cosmic microwave background experiments. In addition, the
twin neutrinos are significantly heavier than their standard model
counterparts, resulting in a sizable contribution to the overall mass density
in neutrinos that can be detected in upcoming experiments designed to probe the
large scale structure of the universe. | Source: | arXiv, 1611.7975 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |