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Paper   IPM / Astronomy / 14575
School of Astronomy
  Title:   CMB and reheating constraints to α-attractor inflationary models
1.  Mehdi. Eshaghi
2.  Moslem. Zarei
3.  Nematollah. Riazi
4.  Ahmad. Kiasatpour
  Status:   Published
  Journal: Phys. Rev. D
  Vol.:  93
  Year:  2016
  Supported by:            ipm IPM
After Planck 2013, a broad class of inflationary models called -attractors was developed which has universal observational predictions. For small values of the parameter , the models have good consistency with the recent CMB data. In this work, we first calculate analytically (and verify numerically) the predictions of these models for spectral index, n_s and tensor-to-scalar ratio, r and then using BICEP2/Keck 2015 data we impose constraints on -attractors. Then, we study the reheating in -attractors. The reheating temperature, T_re and the number of e-folds during reheating, N_re are calculated as functions of n_s. Using these results, we determine the range of free parameter for two clasees of -attractors which satisfy the constraints of recent CMB data.

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