Yes I do, thank you.
Got it - so any particle with a magnetic moment (charged or not) can have one.
OK, thanks, but is the factor of (2) just an artifact of the mathematical formalism, or does/can it be given some intuitive physical interpretation?
Ahh, here's where I'm really weak. I probably just need to study up on QED - though that's NOT very appealing.
Yes, of course that's the standard explanation. My personal research involves looking into the possibility that magnetism is fundamental. By this I don't mean magnetic monopoles, I accept the evidence against their existence. I mean the obvious: the fundamental magnetic charge sources a magnetic field in a dipole configuration. I've never seen anything on this possibility. A corollary I also plan to investigate is: a magnetic charge in motion (spinning) appears to be an electrical charge to a stationary (non-spinning) observer! All of this is pure conjecture on my part, and most likely wrong - but fun to look into!
Thanks for the reference, I'll look into getting it. I'd prefer an on-line version that's free of course!