array9

Neutrinos might have zero basic mass, or some mass.  It does not appear that anyone knows.  Of course, I like to think that they have mass, and then you might be able to do something with them.  Hence this question....

Also I thought it linked nicely to the stupid experiment that thought they might travel faster than c?  Could we move them much slower than c?  That seems much more exciting to me.

If it has no mass, forget it.

If it has mass, then

- create a few from a very fast moving platform, and look at the ones where they fire off against the speed.  can the LHC fire heavy particles into light particles to achieve this?  Or is it always the same particle in both directions?

- fire them off from very near a black hole, and let them slow down against the gravity


* Could the world be full of slow moving neutrinos? And we don't know it?  Something near a black hole?

* If they were slower than the escape velocity of the Earth , would they just oscillate or orbit like a satellite, gently ignoring anything in its way, and in any plane?  Could the earth catch them in some way?  Or a satellite of a galaxy?

* could there be enough to weigh?  Ie dark matter.  How dense could they get?

* once they are slow, can you speed them up?  Do they just accumulate?

I rather assume that all our observations of neutrinos rather depend on them speeding along, and having quite a lot of energy.  Would we actually see slow neutrinos at all, other than their gravitational force.

Martin