Impact of the first LHC results on particle physics, Prof. Guido Altarelli (Roma III and CERN)

The LHC results released so far have very much restricted the possible range for the
Standard Model Higgs boson mass. Moreover some indications for a signal at a mass
around 125 GeV have been found. At the same time, no clear evidence for new physics
has emerged from the LHC data. We discuss the impact of these results on our under-
standing of particle physics. The presently allowed window for the Higgs mass and the
negative results for exotic particles are compatible with both the Standard model and its
Supersymmetric extensions but imply considerable restrictions and need a substantial
amount of fine tuning in all cases. We discuss the options that remain open and the per-
spectives for the near future.