Q&A with Higgs discoverers

They didn't know if it existed or not. Now they know it exists. Most high-energy particle physics is done by analyzing decay products of short-lived particles, so I don't begrudge them that.

It was covered, and now somehow unveiled. They didn't invent it though.

It's probably the Higgs. There are some decay paths that have not yet been observed, some because they haven't analyzed that data yet, and at least one that just doesn't appear to happen as often as predicted (very interesting). But it's acting almost exactly as the Higgs should act, so while it's not absolutely sure, there's no real reason to think that it's not the Higgs.

> Even if they discover higgs boson, is there any chance for standard model to be changed again later on?

Yes.

No matter what they discover that is consistent with the standard model, there's always a chance that a later discovery will invalidate the standard model.

One difference between science and math is that you can prove things correct in math. In science, you can only prove things incorrect.