https://doi.org/10.1140/epjc/s10052-019-6819-z
Regular Article - Theoretical Physics
Tachyon inflation in teleparallel gravity
1
Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz, 1666-16471, Iran
2
Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), P. O. Box 55134 - 441, Maragha, Iran
3
Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS, 66506, USA
* e-mail: izadi@ksu.edu
Received:
19
November
2018
Accepted:
29
March
2019
Published online:
26
April
2019
We present a tachyonic field inflationary model in a teleparallel framework. We show that tachyonic coupled with the f(T) gravity model can describe the inflation era in which f(T) is an arbitrary function of torsion scalar T. For this purpose, dynamical behavior of the tachyonic field in different potentials is studied, it is shown that the tachyonic field with these potentials can be an effective candidate for inflation. Then, we discuss slow-roll conditions and show that by the appropriate choice of the parameters, the inflation era can be explained via this model. Finally, we argue that our model not only satisfies the result of BICEP2, Keck Array and Plank for the upper limit of 
but also, the obtained value for spectral index 
is compatible with the results of Plank and also Plank + WMAP + HighL + BAO at the 68% confidence level.
© The Author(s), 2019
