- #1
eoghan
- 207
- 7
Hi there!
I'm attending an introduction to elementary particle physics and I came into this statement about the Dirac equation:
"When an interaction is added (using the gauge principle) in a field theory, then some terms appear like:
gBj
where, g is the coupling constants, B is a bosonic fields, j is the fermionic current."
And the text doesn't say anything else about that.
Can anyone please explain me better what does g,B and j mean? I know what the gauge principle is, and I guess the bosonic field is just a particle obeying the KG equation.. but what does gBj mean exactly?
thanks
I'm attending an introduction to elementary particle physics and I came into this statement about the Dirac equation:
"When an interaction is added (using the gauge principle) in a field theory, then some terms appear like:
gBj
where, g is the coupling constants, B is a bosonic fields, j is the fermionic current."
And the text doesn't say anything else about that.
Can anyone please explain me better what does g,B and j mean? I know what the gauge principle is, and I guess the bosonic field is just a particle obeying the KG equation.. but what does gBj mean exactly?
thanks