Hi, I'm Steve, the new guy. After a long literature search, I have been unable to find any reference to experimental confirmation of neutrinos of any type oscillating in a vacuum. All of the many models under discussion seem to assume that they oscillate, but nowhere have I been able to find a measurement of the mixing angle. There are many, many articles which show measurement of oscillation while passing thru condensed matter-- and none which demonstrate this in vacuo. Can anybody point me at a reference which doesn't simply assume this, or one which measures it? Thanks.