alt Hacker NewsI would imagine the problem is that there are too many of them.
For better or worse the prize can only go to 3 people. Over the years there are generally many dozens of people who make absolutely critical contributions to these kinds of experiments. In this case, though, the same guy was listed as the PI of the UW Madison group, and Madison is very clearly "the" operator of the project.
Halzen is by any measure an awesome physicist, but he's also a good "fit" for the Nobel because of this unique situation.
I was in the IceCube experiment for a bit as well as the ATLAS Experiment at CERN. So you could say I contributed a bit to both this and the Higgs Nobel. Being part of these big collaborations, you know what the deal is. The Nobel is excellent PR for physics, and science in general, but it is just a prize. Francis is the singular leader of IceCube, and a visionary in the area, it is perfectly fair to award it to him, if not to the total collaboration. As for theory, I don’t think this award hinges on theoretical predictions but the enablement of observation itself.