Originally Posted by **topsquark** Of course I'm talking about it in terms of QM! The solutions are wavefunctions, which are not Classical Physics. |

That is

*totally incorrect* my dear friend. The solutions are

*not* wave functions. In the event that the result is a wave then it's a classical wave, not a wave function. E.g. if you set m = 0 then the solution is Maxwell's equations. It need not even be a wave. It could be a static EM field in fact.

Originally Posted by **topsquark** The Proca equation is the wave equation for a spin 1 particle. *Any* spin 1 particle be it massive or massless. |

That is absolutely wrong. The solution is MAXWELL'S EQUATIONS (ME). You can't claim that ME use any other particle to carry the EM field other than photons. Where are you getting this ideas from Dan? Please read Jackson on this to learn what it's actually all about.

In the mean time see:

https://en.wikipedia.org/wiki/Proca_action
Originally Posted by **Wikipedia** |

In contrary to this you hold that the equations will reduce to something else if m = 0. What is it that it reduces to in your mind?

Originally Posted by **topsquark** Yes, when we set m = 0 you get Maxwell's equations. I'm not arguing against that. But if m is not 0 then we don't have the Maxwell equations. |

But what you're failing to grasp is that the solutions are still the electromagnetic equations. The only difference is that it applies to electrodynamics when the photon has non-zero proper mass.

Originally Posted by **topsquark** I really don't understand where the confusion is. |

The problem is that you appear to think that the solution yields something other than the equations for electrodynamics with non-zero photon mass.

Originally Posted by **topsquark** I don't want to get into a war about who has the better sets of reference material but I have three texts that say exactly what I just said above. |

All that I'm doing is asking you to read the section on the Proca Lagrangian in Jackson's text so we can discuss it. I don't believe any other text will say that will differ.

Dan - This isn't a war. All we have here is a disagreement. I might just be wrong but I don't change my beliefs because you or someone else tells me to. I only change my belief when I'm convinced that I'm wrong. And if I'm wrong then it's extremely important to me to find out. That's what I'm asking you to do, i.e. have the patience to do what I'm doing and remaining polite and discussing it. I will not make this into a war and I can't believe that you'd make it into one either.

I've been using terms like "I can't believe that you think that way etc." I beg you to have patience with me. I'm not trying to diss you. I just don't want to take a lot more time writing responses because I spend a great deal of time trying to phrase it better. Okay buddy?

Best wishes my friend,

Pete

ps - If you're ill then I hope you feel better.

**Get well soon.**