The discussion centers on the coupling constant Gz in relation to the Z boson interactions with leptons, anti-leptons, quarks, and anti-quarks. It is established that the coupling constant varies based on the type of interaction, specifically Gz = Gz.Sin(z) for certain interactions and Gz = Gz.Cos(z) for others, particularly in the context of quark interactions. The conversation also touches on the implications of Charge Parity Time (CPT) violations and the running of coupling constants, which complicates the notion of a constant coupling. The participants seek clarification on the differences in coupling constants for various particle interactions.
PREREQUISITESParticle physicists, quantum field theorists, and students studying electroweak interactions will benefit from this discussion, particularly those interested in the nuances of coupling constants and their applications in particle interactions.
venomxx said:Homework Statement
Just a quick question, the Z can couple to leptons and there antiLeptons and quarks and there corresponding antiquark. Is the coupling constant just Gz for all these interactions? Or is it Gz.Sin(z) for some and not for others?
Iv seen different notation and am wondering why?
venomxx said:Cheers for the response :)
So for a Z --> e-e+ and Z--> qq" the coupling constants would be the same? Gz = gz*Sin(z)? I know that it changes for the weak depending on if its interacting with quarks or leptons, I am still unsure of why the difference?
Also out of curiosity... i thought it can't be constant because of the 'running of the coupling constants' idea?
Schrödinger's Dog said:Exactly weak has CPT violations inherent in it thus The Nobel prize for electro/weak theory.