Huber, Stephan J and Sopena, Miguel (2012) The bubble wall velocity in the minimal supersymmetric light stop scenario. Physical Review D (PRD), 85 (10). p. 103507. ISSN 1550-2368
![]()
|
PDF
- Published Version
Download (428kB) | Preview |
Abstract
We build on existing calculations of the wall velocity of the expanding bubbles of the broken symmetry phase in a first-order electroweak phase transition within the light stop scenario (LSS) of the MSSM. We carry out the analysis using the 2-loop thermal potential for values of the Higgs mass consistent with present experimental bounds. Our approach relies on describing the interaction between the bubble and the hot plasma by a single friction parameter, which we fix by matching to an existing 1-loop computation and extrapolate to our regime of interest. For a sufficiently strong phase transition (in which washout of the newly created baryon asymmetry is prevented) we obtain values of the wall velocity, vw≈0.05, far below the speed of sound in the medium, and not very much deviating from the previous 1-loop calculation. We find that the phase transition is about 10% stronger than suggested by simply evaluating the thermal potential at the critical temperature. We also comment on the relevance of our results to extended models, such as the NMSSM.
Item Type: | Article |
---|---|
Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Subjects: | Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics |
Depositing User: | Stephan Huber |
Date Deposited: | 07 Nov 2012 12:26 |
Last Modified: | 07 Mar 2017 06:12 |
URI: | http://srodev.sussex.ac.uk/id/eprint/41355 |
View download statistics for this item
📧 Request an update