https://doi.org/10.1140/epjc/s10052-019-7589-3
Regular Article - Theoretical Physics
-attractor from superconformal E-models in brane inflation
1
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
2
School of Physics, Nankai University, 94 Weijin Road, Nankai District, Tianjin, 300071, China
* e-mail: yggong@hust.edu.cn
Received:
11
July
2019
Accepted:
23
December
2019
Published online:
10
January
2020
In the large extra dimensional braneworld inflation, Friedmann equation is modified to include a quadratic term in energy density with an additional parameter 
called brane tension in addition to the usual linear term. The high energy brane corrections modify the slow-roll parameters and affect the behaviour of inflation. We analyse the superconformal inflation for E-models and find that there exist -attractors in brane inflation. The predictions for the scalar spectral index 
and the tensor-to-scalar ratio r are computed numerically, and approximate analytic formulas in the high energy limit have been given for the observable and r. The constraints on the model parameters are obtained by using Planck 2018 and BICEP2 observational data.
© The Author(s), 2020
