Comment Re:New ways to generate... gravity? (Score 1) 86
This isn't really related to gravity. Neutrinos are (as far as we know) fundamental particles. They are creating pairs of quarks (as far as we know fundamental) bound together to for a pion.
Gravitons are a different fundamental particle and interact much more weekly than do neutrinos. In principal there is probably some cross section for neutrinos interacting to produce gravitons, but the probability is exceptionally tiny.
Gravitons are part of the quantum description of gravity, but they have not been directly detected as particles - the interaction is so weak that it is difficult to imagine an experiment that could do that .