When I spoke to an exo collaborator he told me that exo put a really tight limit on the rate of neutrino-less double beta decay. If I was a betting man I would

When I spoke to an exo collaborator he told me that exo put a really tight limit on the rate of neutrino-less double beta decay. If I was a betting man I would put it in the same category as proton decay, another theoretical physics favorite.