Supersymmetry with R-symmetry: Neutrinos, Higgs boson and dark matter

Supersymmetry remains the favourite scenario to look for physics beyond the Standard Model. In this talk I will discuss light neutrino masses and mixing, phenomenology of a keV sterile neutrino dark matter and physics in the Higgs sector, in the framework of a supersymmetric extension of the standard model with a U(1)R symmetry. The lepton number of the standard model fermions are identified with the negative of their R-charges. I will highlight some distinctive features such as the existence of Dirac gauginos, relaxed bounds on squarks, as well as an interesting connection to active and sterile neutrino physics arising from R-symmetry breaking. The lightest Higgs boson mass receives an additional tree level contribution proportional to the square of the neutrino Yukawa coupling f. This allows for a 125 GeV Higgs boson at the tree level for an order one f and still having a small tree level mass for the active neutrino.