All of science is collaborative and this is especially true in these big experiments: the IceCube collaboration is over 400 people [1] from several dozen institutes. There are a lot of experiments where giving a Nobel prize would be impossible because there's no "principal investigator" for the experiment.

[1]: https://icecube.wisc.edu/collaboration/meet-the-collaboratio...

I wonder - was there really no other people they could have given it to? The detection of gravitational waves was split between a theorist, experimentalist and a person who had a big hand in shepherding the project along. Could not the same have been done here?

1992