I’ve seen a few articles about neutrinos recently, high energy ones, super fast ones, ones from open space, others from “sources”, and my understanding of the particle is that it’s very hard to detect, passes through light-years of lead without interaction, etc. don’t headings and speed require multiple readings to make? How do we know the velocity of a neutrino when we can only detect them at single points?
I was just reading the Ars article about the new seafloor detector and comments on that. From that, it sounds like there’s a cascade of the neutrino decaying into other particles and emitting light/radiation as it goes, so I would assume that gives you a vector and I wonder if different stages emit different wavelengths. Glad to be corrected though!