Question: Following the discovery of the Higgs Boson at 125GeV at the LHC, what do you think is next for the theories of supersymmetry and the multiverse and which do you believe to be true?

Joel Goldstein answered on 26 Jun 2020:

The LHC has produced no evidence of supersymmetry so far, which means that if supersymmetric particles exist their mass must be quite high (typically >1 TeV) which makes them less interesting in many ways. (I have to admit that I have never been a great fan…)

Personally, I would like to hope that the LHC will discover something complete new: a new sector of matter particles, interacting via previously unknown forces. This could be at high energy, perhaps explaining the structure we see in the particles we know (why there are six quarks and six leptons for examples) or at lower energy which could explain dark matter.

The idea that we are in a multiverse is appealing as a consistent way to understand quantum mechanics, but I am not sure if we could ever find evidence for it.