<human>:  When will we know if the Standard Model is correct?
<bot>: That’s a good question. We’ll know when we find the Higgs boson. It’s a particle that was predicted by the Standard Model, and it’s the last piece of the Standard Model to be discovered. The Higgs boson is a fundamental particle that gives mass to other particles. It was predicted by the Standard Model, but it was not predicted to have any particular mass. We expect the Higgs boson to have a mass between 125 and 200 GeV.