http://arxiv.org/abs/2009.10080
We critically examine the magnitude of theoretical uncertainties in perturbative calculations of first-order phase transitions, using the Standard Model effective field theory as our guide. In the usual daisy-resummed approach, we find large uncertainties due to renormalisation scale dependence, which amount to two to three orders-of-magnitude uncertainty in the signal-to-noise ratio for gravitational wave experiments, such as LISA. Alternatively, utilising dimensional reduction in a more sophisticated perturbative approach drastically reduces this scale dependence. Further, this approach resolves other thorny problems with daisy resummation: it is gauge invariant which is explicitly demonstrated for the Standard Model, and avoids an uncontrolled derivative expansion in the bubble nucleation rate.
D. Croon, O. Gould, P. Schicho, et. al.
Wed, 23 Sep 20
-1761/86
Comments: 103 pages, 11 figures
You must be logged in to post a comment.