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Sphaleron bound in some nonstandard cosmology scenarios
- Source :
- International Journal of Modern Physics A. 37
- Publication Year :
- 2022
- Publisher :
- World Scientific Pub Co Pte Ltd, 2022.
-
Abstract
- In the first scenario, we revise the upper bound of the cutoff scale of the dimension-six potential Higgs operator required for a successful electroweak baryogenesis in the case of a modified expansion history caused by the existence of a non-interacting scalar field at the time phase transition happens. The upper bound 860 GeV of the cutoff scale in the conventional case can be improved to 1 TeV in the modified expansion case under certain conditions. In the second scenario, we consider the Randall-Sundrum type II model. We show that the lower bound of the five-dimensional Planck scale in this model, which is determined from the validity of Newtonian gravitational potential at small distance, turns out to be crucial in eliminating this model as a viable candidate to satisfy the sphaleron bound; however, again modifying the expansion history by including a non-interacting scalar field at the electroweak scale can then make this model satisfy the sphaleron bound with a certain parameter space.<br />16 pages, 6 figures, 1 table
Details
- ISSN :
- 1793656X and 0217751X
- Volume :
- 37
- Database :
- OpenAIRE
- Journal :
- International Journal of Modern Physics A
- Accession number :
- edsair.doi.dedup.....d4895d59f774fc437ffb5634250a1e6e