Theoretical uncertainties for cosmological first-order phase transitions

Journal of High Energy Physics

Tuomas V. I. Tenkanen¹  Oliver Gould²  Philipp Schicho²  Graham White³  Djuna Croon³ 

[1] Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern;Department of Physics and Helsinki Institute of Physics, University of Helsinki;TRIUMF;

关键词: Cosmology of Theories beyond the SM;    Resummation;    Thermal Field Theory;    Beyond Standard Model;   

DOI  :  10.1007/JHEP04(2021)055

来源: DOAJ

【 摘 要 】

Abstract We critically examine the magnitude of theoretical uncertainties in perturbative calculations of fist-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 peak gravitational wave amplitude, relevant to experiments such as LISA. Alternatively, utilising dimensional reduction in a more sophisticated perturbative approach drastically reduces this scale dependence, pushing it to higher orders. 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.

【 授权许可】

Unknown