Short baseline neutrino experiments , like LSND and MiniBooNE experiments , pointed towards the existence of eV mass scale sterile neutrinos .
To reconcile sterile neutrinos with cosmology self interaction between sterile neutrinos has been studied .
We analysed Planck cosmic microwave background ( CMB ) data with self-interacting sterile neutrino ( SI \nu ) and study their impact on inflation models .
The fit to the CMB data in SI \nu model is as good as the fit to \Lambda CDM model .
We find that the spectral index ( n _ { s } ) values shift to 0.9375 \pm 0.0058 in SI \nu model .
This has significant impact on the validity of different inflation models .
For example the Starobinsky and quartic hilltop model , which were allowed within \Lambda CDM cosmology , are ruled out .
On the other hand some models like natural and Coleman-Weinberg inflation are now favoured .
Therefore , the existence of self interacting sterile neutrinos with eV order of mass will play an important role in the selection of correct inflation model .