Is PLANCK consistent with primordial deuterium measurements ?
  The recent measurements of the Cosmic Microwave Background Anisotropies
provided by the Planck satellite experiment have significantly improved the
constraints on several cosmological parameters. In this brief paper we point
out a small but interesting tension present between recent values of the
primordial deuterium measured from quasar absorption line systems and the same
value inferred, albeit indirectly, from the Planck measurements assuming
{\Lambda}CDM and Big Bang Nucleosynthesis. Here we discuss this tension in
detail investigating the possible new physics that could be responsible for the
tension. We found that, among 8 extra parameters, only an anomalous lensing
component and a closed universe could change the Planck constraint towards a
better consistency with direct deuterium measurements.
