A Photon decay/splitting

[JimWhoKnew]

I'm looking for recommended references that address the possibility/impossibility of photon decay/splitting through the QED process (in vacuum):

Incoming photon --> virtual fermion - anti fermion loop --> three outgoing lower-energy photons (propagating at the same direction as the incoming photon, to satisfy the conservation of energy and angular momentum)

Please help

 

[PAllen]

Here is an old thread I started, addressing this very question. The discussion turned up a bunch of historic literature on the subject.

https://www.physicsforums.com/threads/photon-decay-can-high-energy-photons-transform.512811

 

[JimWhoKnew]

Here is an old thread I started, addressing this very question. The discussion turned up a bunch of historic literature on the subject.

https://www.physicsforums.com/threads/photon-decay-can-high-energy-photons-transform.512811

Thanks @PAllen !

I read the thread (not thoroughly) and will take a look at the papers referenced there.