Future constraints on the Hu-Sawicki modified gravity scenario
  We present current and future constraints on the Hu and Sawicki modified gravity scenario. This model can reproduce a late time accelerated universe and evade solar system constraints. While current cosmological data still allows for distinctive deviations from the cosmological constant picture, future measurements of the growth of structure combined with Supernova Ia luminosity distance data will greatly improve present constraints. 
Matteo Martinelli, Alessandro Melchiorri, Olga Mena, Valentina   Salvatelli and Zahara Girones
astro-ph.CO