Do particles exist forever? Can Anything Exist forever?

mathman

Grand unified theories seem to require proton decay. However, all experiments to date have come up with a half life something > 10³³ years, i.e. no decays observed.

mathman Recognitions: Science Advisor	Do particles exist forever? Can Anything Exist forever? Grand unified theories seem to require proton decay. However, all experiments to date have come up with a half life something > 10³³ years, i.e. no decays observed.