Stern-Gerlach experiment with Gravitons

[zen loki]

It has long been predicted that gravitons will be spin 2. If that is true, then if we have a sufficient magnetic field, what is to stop us from recreating the Stern-Gerlach experiment and using a magnetic field to diffract them?

Now, we have made very strong magnetic fields and to my knowledge, diffracting gravitons have never been detected.

The only reason I can think of, is that the gravitons are virtual, but that should not mean the magnetic field does not effect them, right?

 

[tom.stoer]

The B-field does not couple to the spin but to the magnetic moment μ which is proportional to the spin S

μ = g q/2m S

where the dimensionless quantity g is called the g-factor.

For a elementary, massless, uncharged particle it is natural to assume g=0 (there may be quantum effects changing this relation).

Before asking this question regarding gravitons one should try to answer this question for photons.