Tachyon field inflation in the light of BICEP2
  We study tachyon field inflation in the light of the Planck+WMAP+BICEP2+BAO joint data. While the minimally coupled tachyon field inflation is consistent with the Planck2013 data, it is not confirmed by the Planck+WMAP+BICEP2+BAO dataset. However, a nonminimally coupled tachyon field inflation is consistent with this joint dataset. 
Kourosh Nozari and Narges Rashidi
astro-ph.CO gr-qc hep-th