# ICHEP2018 SEOUL

Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

## Probing the Reheating Temperature with a Gravitational Waves: with application to Gauss-Bonnet Inflation

Jul 5, 2018, 11:15 AM
15m
104 (COEX, Seoul)

### 104

#### COEX, Seoul

Parallel Astro-particle Physics and Cosmology

### Speaker

Gansukh Tumurtushaa (Institute for Basic Science)

### Description

In this work, inflationary models with Gauss-Bonnet term is classified into two categories based on their prediction for the tensor spectral index ($n_T$). We showed that the energy spectrum of the primordial gravitational waves (GWs) induced by a group of models that predict blue-tilted tensor spectrum ($n_T>0$) can be probed by the future space-based laser interferometer experiment such as DECIGO in frequency ranges of $0.1-10$ Hz. If the signals of primordial GW background from our models is detected, it would determine the lower bound of the reheating temperature, which is $T_\text{re}\geq10^{-6}$ in our case. Our further analyses on reheating parameters imply that the effect of GB term is significant not only during inflation but also during reheating regardless of the process is instantaneous or lasted for a certain number of $e$-folds until it completes.

### Primary authors

Gansukh Tumurtushaa (Institute for Basic Science) Bum-Hoon Lee (Sogang University) Seoktae Koh (Jeju National University)