Is there a glass transition in polydisperse hard spheres?

In the last years, significant discussion in the scientic community has taken place concerning the glass transition of hard sphere (HS) colloidal particles following the experimental results by Brambilla and coworkers, appeared in Phys. Rev. Lett. In 2010. This work on colloidal HS pushed the observation timeto unprecedented range and found that the glass transition, expected at packing fraction ... ...