Please help me with two very silly questions.
Assuming supersymmetry is correct, why don't we observe the superpartners of the Standard Model particles at ordinary energies? Why do we have to search for selectron in colliders when we could easily observe electrons at ordinary energies? Is selectron much heavier than an electron to exist at ordinary energies?
If supersymmetry gets excluded at LHC, what would it mean for Superstring theory which I guess requires supersymmetry to be true?