Recent content by JCCJ

I think the question/problem is quite clear: The problem 19.1 from the peskin QFT book. I give as a fact that anyone in the high energy physics section has acces to this book to refer to the problem. Anyway the problem is the following: given the equation -i \sigma \cdot D \psi_R=0, where...

Hi, I'm trying to do this problem (19.1 from Peskin) that apparently should be quite straightforward but when I plug the anzat given at c) into the equation I don't get an harmonic oscillator as the book indicates. Could please anyone tell me what is wrong? Thanks

Thanks! Yes I did it, I was puzzled because at first glance it seemed to me arbitrary regard this kinetic counterterm as part of the interaction hamiltonian and the standar kinectic term not, but I have clarified myself.

I'm studing the basics of renormalization (with phi^4 theory) and once you write the renormalized lagrangian with the counterterms, how do you derive the feynmann rules asociated to the kinetic counterterm? ---∅--- = i(p^2 δ Z - δ m) How??...