array9

Two photons will pass through each other as if nothing has happened.  Supposedly.

Can two neutrinos do the same thing?

Do you have to have stationary mass to collide?  Could you get other forces to work on photons so that they would react to each other?

Of course you have to have some force between two neutrinos in order for them to 'collide', and I guess the question is whether they have that.  If they react with other matter maybe that says that they should in principle be able to react with each other.

While the experiment sounds nice and easy, I somehow doubt if you could do it in a reasonable time.

I would say that if they have mass, then they can clearly can interact and 'collide'.  Indeed a narrow beam of them would presumably oscillate under their own gravity, converging and then diverging.  Presumably rather like photons passing each other would, having mass.

But somehow I feel that these guys are so minimal, that anything else is just plain unlikely.  Indeed they may be able to occupy the same space without any issue.


Life as a neutrino would however be pretty lonely,  with nothing ever happening to it, except the occasional bump into some real matter.  Though their birth must have been quite fun, and presumably a backwards running of the tape would show that they can indeed collide with somethings in a death.

martin