Speaker
Wenbin Zhao
(Bethe Center for Theoretical Physics, University of Bonn)
Description
We propose a new classes of inflation models based on the modular symmetry, where modulus field $\tau$ serves as the inflaton. We make a connection between modular inflation and modular stabilization, and the modulus field rolls towards fixed point after inflation. We find the modular symmetry strongly constraints the possible shape of the potential and find some parameter space where the inflation predictions agree with cosmic microwave background observations. The tensor to scalar ratio is predicted to be smaller than $10^{-6}$ in our models, while the running of spectral index is in order of $10^{-4}$.
Authors
Prof.
Guijun Ding
(University of Science and Technology of China)
Mr
Siyi Jiang
(University of Science and Technology of China)
Wenbin Zhao
(Bethe Center for Theoretical Physics, University of Bonn)
