Neutrino-AntiNeutrino Collisions: EM Field?

[cragar]

When a neutrino and an anti-neutrino collide they produce a photon , from what field does this photon come from. Photons are excitations of an EM field correct. or what about neutron anti-neutron collisions .

 

[ansgar]

no they do not produce photons if they collide...neutron - antineutron will create lots of different things, there are a lot of hadron - antihadron particles which can be produced.

 

[tom.stoer]

I think we had a related discussion here; the neutrino couples only to vector bosons, so a Z° pair can be created which will eventually decay in hadronic and leptonic final states.

 

[Vanadium 50]

You most certainly can produce photons in neutrino antineutrino collisions. You have a box diagram with a nu-nubar going in, a W on one side of the box, e's on the other 3 sides, and two photons going out.

 

[cragar]

thats what i thougt , so where is the EM field that produces these photons.

 

[ansgar]

thats what i thougt , so where is the EM field that produces these photons.

from the loop induced vector boson and the fermions

 

[tom.stoer]

You most certainly can produce photons in neutrino antineutrino collisions. You have a box diagram with a nu-nubar going in, a W on one side of the box, e's on the other 3 sides, and two photons going out.

A box diagramm is one-loop and therefore highly suppressed.

 

[ansgar]

A box diagramm is one-loop and therefore highly suppressed.

yes, almost anything is allowed if one includes loops

 

[Vanadium 50]

A box diagramm is one-loop and therefore highly suppressed.

And that's a bigger problem than colliding beams of neutrinos and anti-neutrinos??

 

[tom.stoer]

And that's a bigger problem than colliding beams of neutrinos and anti-neutrinos??

Of course not, the whole discussion is not really practice-oriented :-)