Might it have something to do with Neurtinos coming in three flavours?
As I understand it the current theory is that neutrinos change between three states, it may be that one of the expriments detects only one state of nuetrino whereas the second experiment (using different detectors) might...
If you have a proton and an anti-proton traveling in the same direction with momentum from A to B but during the flight time they become attracted due to their opposite charges and annilhilate, the momentum I would guess is transferred to the resulting unstable K particles mesons etc, which, as...