lnauta

Nope. Originally I opted out when it let me (was that 2016?) and when this tos came along I couldn't get some people to switch to signal so decided to see how long it will let me press the x button. Which still works. It seems the pop up has a 24h cooldown for me (EU).

That depends on the energy of the neutrino, for lower energies there will be some momentum exchange, but since neutrinos are extremely light, this may be neglected depending on your experimental setup.

At higher energies (>GeV) depending on the interaction type (whether a W-boson or a Z-boson is exchanged), a charged lepton comes out, which can be an electron, muon or tau (the tau decays very fast) and this is the same as the neutrino flavor. Or a hadronic shower if a nucleon is hit.

Of course it's always more complicated than that: for lower energies (sub-GeV) you get resonance scattering, where the nucleus will emit a meson (quark-anti-quark particle), or deep-inelastic scattering, where the nucleus is broken up and hadronic particles create a cascade of more particles.

Edit: see https://en.wikipedia.org/wiki/Particle_shower for more on these cascades. It's a bit bare-bone, I don't have a nice reference right now.

This decision will be made next year at the earliest.

Source: I work in one of the physics labs that is pushing ET.