Do Massless Particles Interact in Particle Physics?

[taylrl3]

Are there any reactions in that require the interaction of massless particles or am I right in thinking this is impossible? Thanks

 

[mathman]

It is possible for two photons with high enough energy to interact and produce a particle + anti-particle pair. According to big bang theory, this was going on right after the big bang and led to the creation of matter.

 

[nicksauce]

See: http://en.wikipedia.org/wiki/Delbruck_scattering

 

[taylrl3]

Thanks for the link :-) I'm wondering what happens in the reference frame of the photon when this reaction occurs.

 

[Meir Achuz]

In QCD, there direct interactions between massless gluons.

 

[jtbell]

I'm wondering what happens in the reference frame of the photon when this reaction occurs.

Photons don't have reference frames, at least not the kind we're used to. We get threads about "reference frame of a photon" or "photon's point of view" probably every month in the relativity forum.

 

[negru]

We get threads about "reference frame of a photon" or "photon's point of view" probably every month in the relativity forum.

Yeah, and that jerk Einstein started it all