Well... no. Carlo Rubbia and Simon van der Meer were awarded the Nobel prize in 1984 for the discovery of the W and Z particles (January 1983). Glashow, Salam and Weinberg were awarded with it in 1979, before the Electroweak Theory was fully confirmed, although there were solid hints at that time, it was a bit premature.
I'm really not too happy about this because the Nobel prize has shunned deserving scientists again. The consensus is that this mechanism can be attributed to three papers, One from Englert and Brout, another from Higgs, and yet another from Guralnik, Hagen and Kibble.
The silly rule of having to give the award to at most three living authors rules out Brout and, as it would be a problem to choose one of GHK (because they signed in alphabetical order, good for them) it's too obvious why they're out, even when the current understanding of the theory can be traced back to their string of papers.
This is not the first time: for instance, nobody really understands why Cabibbo wasn't awarded some years ago along with Kobayashi and Maskawa... for the CKM matrix!
GHK published their paper later in the year (although they apparently arrived at the result independently..), which might be why they were left out.
In 1962 P.W. Anderson worked out that Nambu–Goldstone massless mode can combine with the massless gauge field modes to produce a massive vector field (e.g. the so-called "higgs-mechanism", but in a non-relativistic context). In 1964 E&B,H,GHK showed that this is also possible in a relativistically invariant theory.
Here's a twitter comment from John Preskill (caltech):
"The emphasis on finding a relativistic model may be misplaced, though. Anderson understood the mechanism well."
https://twitter.com/preskill/status/387580651664191488
So maybe Anderson is more deserving of the last spot than GHK.
Civilized behavior would imply private splitting of the cash, at least. I can't remember an example of that ever happening with any Nobel award in any field, although its probably happened. One of those things I'm not sure how to google for without getting 99% unrelated. If done completely privately there may be no public record of any sort...
I've always had the impression that the cash is the least important part of a Nobel prize. Even if you're being purely mercenary about it, Nobel laureates can probably get paid speaking engagements whenever they want. But it's the prestige that really matters, and I suspect that for most scientists a share of the cash would be a poor substitute.
They often award the physics prize for experimentally verifying a theoretical prediction. For example, they awarded the prize to Paul Dirac for predicting the existence of the positron, and to Carl Anderson for confirming it.
Unlikely. Attribution in this case is a very thorny issue. People have been discussing it for decades.
There may yet be an experimental prize, especially once the experimental work at LHC is complete. From a physics perspective, LHC has only just begun. For the Higgs alone, its spin has not yet been conclusively measured; it's an important parameter.
EU won the peace prize, which is an entirely separate award from the science prize and handled by an entirely separate committee operating under entirely separate rules.
The statutes of the Nobel Foundation, § 4 reads (in part and translated): "If a work that is being rewarded has been produced by two or three persons, the prize shall be awarded to them jointly. In no case may a prize amount be divided between more than three persons."
I was just listening to the news, and apparently over 3000 people were more or less involved with the work at CERN. I don't think the physics prize has ever been awarded to an institution like the peace prize has been in the past, and I think the Academy simply chose not to break tradition.