ABSTRACT
We are now approaching the time when experiments will tell us what the new physics is that will replace the Standard Model. Neutrino experiments have already shown the breakdown of the Standard Model with the evidence of neutrino masses. However, this does not shed light on how the new dynamics resolves the gauge hierarchy problem, and there are many suggestions for this: SUSY and SUGRA models, extra dimensions (large and small), string/M-theory models, etc.
