Basically Kerry, you got it in a nutshell.
What will they do if they find the "God particle"??...Pray to it
There's probably not much it will do for Humanity in general, except make some physicists warm in their hearts when they receive the Nobel Prize for Physics. It'll be just one more step into allowing us to be able to define how our existence is structured and why things are the way they are. As for being put into use as a weapon....we wouldn't even have enough generating capacity on this planet to even be able to use the properties of the Higgs boson to generate a weapon of any kind. We may be able to detect it, but to put that to use takes several orders of magnitude more power and a lot better understanding than we currently have. Maybe in a hundred or so years....or a couple of hundred....we may have an answer to that possibility.