New parametrization and results on testing deviations from general relativity in cosmology

We present a new phenomenological parametrization to test deviations from general relativity at cosmological scales based on the perturbed Einstein's equations. We then present current constraints from applying the parametrization to current cosmological data sets from the Cosmic Microwave Radiation, Baryon Acoustic Oscillations, Redshift Space Distortion, 3 X 2 pts clustering and weak lensing, and supernova data. We report tensions found with general relativity along with a bayesian model selection analysis about their significance.