PhysRevD.85.103507.pdf (418.12 kB)
The bubble wall velocity in the minimal supersymmetric light stop scenario
journal contribution
posted on 2023-06-08, 12:43 authored by Stephan HuberStephan Huber, Miguel SopenaWe 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.
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Publication status
- Published
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- Published version
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Physical Review D (PRD)ISSN
1550-2368Publisher
American Physical SocietyPublisher URL
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10Volume
85Page range
103507-103507Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
Legacy Posted Date
2012-11-07First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-08-17Usage metrics
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