Eur. Phys. J. C (2018) 78: 608
https://doi.org/10.1140/epjc/s10052-018-6085-5

Regular Article - Theoretical Physics

Probing signatures of bounce inflation with current observations

¹ Institute of Astrophysics, Central China Normal University, Wuhan, 430079, China
² Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100086, China
³ Department of Physics, College of Sciences, Northeastern University, Shenyang, 110004, China
⁴ Center for High Energy Physics, Peking University, Beijing, 100080, China

^* e-mail: nishulei@mails.ccnu.edu.cn

Received: 23 December 2017
Accepted: 19 July 2018
Published online: 30 July 2018

Abstract

The aim of this paper is to probe the features of the bouncing cosmology with the current observational data. Basing on bounce inflation model, with high derivative term, we propose a general parametrization of primordial power spectrum which includes the typical bouncing parameters, such as bouncing time-scale, and energy scale. By applying Markov Chain Monto Carlo analysis with current data combination of Planck 2015, BAO and JLA, we report the posterior probability distributions of the parameters. We find that, bouncing models can well explain CMB observations, especially the deficit and oscillation on large scale in TT power spectrum.