Searching for features of a string-inspired inflationary model with cosmological observations

@article{Cai2015SearchingFF,
  title={Searching for features of a string-inspired inflationary model with cosmological observations},
  author={Yi-Fu Cai and Elisa G. M. Ferreira and Bin Hu and Jerome Quintin},
  journal={Physical Review D},
  year={2015},
  volume={92},
  pages={121303}
}
The latest Planck results show a power deficit in the temperature anisotropies near $\ell \approx 20$ in the cosmic microwave background (CMB). This observation can hardly be explained within the standard inflationary $\Lambda$-cold-dark-matter ($\Lambda$CDM) scenario. In this paper we consider a string theory inspired inflationary model (axion monodromy inflation) with a step-like modulation in the potential which gives rise to observable signatures in the primordial perturbations. One… 

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