3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

Renormalization-Scale Uncertainty in the Decay Rate of False Vacuum

4 Jul 2016, 16:30
20m
Alice Hoy Room 333 ()

Alice Hoy Room 333

Talk Precision Calculations and Simulations Precision Calculations and Simulations

Speaker

Yutaro Shoji (University of Tokyo)

Description

It is sometimes discussed that we may be in a meta-stable vacuum and its decay time is longer than the age of universe. In most papers, the decay rate is estimated without calculating the pre-exponential factor because they believe that it is much less significant than the exponential suppression factor. What we point out is that this estimate can involve a large error owing to the renormalization scale uncertainty. Since the renormalization scale is relevant in calculation of bounce solution and its action, it modifies the decay rate and the uncertainty can be comparable to the exponential factor. To control the scale dependence, we explicitly calculate the pre-exponential factor and show that it is greatly reduced.

Primary authors

Dr Motoi Endo (KEK) Prof. Takeo Moroi (University of Tokyo) Yutaro Shoji (University of Tokyo) mihoko nojiri (KEK)

Presentation Materials