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yep I totally agree with you, we cant really say anything directly related to them. it is just because of the symmetry in the existance of particles that scientists say they exist and of course their effect on other matter and antimatter inthe universe
That's not strictly accurate. Neutrinos were first detected in 1953 (I remember that as I was born that year. NB. I don't recall the actual event, obviously! I just remember reading that it was in that year.).
The neutrino experiment, also called the Cowan and Reines neutrino experiment, was performed by Clyde L. Cowan and Frederick Reines in 1956. This experiment confirmed the existence of the antineutrino—a very small and neutrally charged subatomic particle.
A sterile neutrino is a hypothetical neutrino that does not interact via any of the fundamental interactions of the Standard Model. It is a right-handed neutrino or a left-handed anti-neutrino.
So try and create an experiment to find a particle that reacts to only one of the major forces - names gravity (indeed - one might speculate that it would have the attributes of dark matter).
Quote from: another_someone on 04/09/2007 23:54:17So try and create an experiment to find a particle that reacts to only one of the major forces - names gravity (indeed - one might speculate that it would have the attributes of dark matter).I thought they were affected by the weak force 
how is it possible that neutrinos are not affected by gravity? doesnt that disprove general relativity?