Recent content by gjj

Non-relativistic Bremsstrahlung is discussed classically in Rybicki “Radiative Processes in Astrophysics” where Larmor’s formula is used to find the power radiated in a collision between an electron and a Coulomb field. The Fourier transform of the pulse allows for a description of the pulse in...

Thanks for reply. I think I understand what you're saying, but I'd like to be sure. What Schwartz says is "Since the integral is a tensor under Lorentz transformations but only depends on the scalar Δ, it must be proportional to the only tensor around, gμν." I interpreted that statement to...

We're trying to reduce the tensor integral ##\int {\frac{{{d^4}k}}{{{{\left( {2\pi } \right)}^4}}}} \frac{{{k^\mu }{k^\nu }}}{{{{\left( {{k^2} - {\Delta ^2}} \right)}^n}}}{\rm{ }}## to a scalar integral (where ##{{\Delta ^2}}## is a scalar). We're told that the tensor integral is proportional...

Thank you for your answer. I am now clear that in QFT charge conjugation means flipping all the spins and thus also flipping the electric and magnetic fields. Unfortunately, I'm looking at the Feynman-Stueckelberg approach to QED which I realize is not the best approach to QED. In your...

Is there a difference between the meaning of charge conjugation in Relativistic Quantum Mechanics and its meaning in Quantum Field Theory? In chapter 4.7.5 of "Thomson Modern Particle Physics" the charge conjugation operator is derived without changing the electromagnetic field Aμ. This...

Thanks for your help WannabeNewton. Why do you say that Taylor/Wheeler are not working in the non-relativistic limit? From what I can see both Goldstein/Eisberg and Taylor/Wheeler are working in the non-relativistic limit, so I'm not sure how that could account for the different answers...

I've looked at Taylor and Wheeler's Spacetime Physics Example 103 on the Thomas Precession and also the discussion of Thomas precession in Eisberg and Goldstein (3rd edition). Both treat the rotation angle gotten by the addition of 2 non-collinear velocities. The answers they get are...