- #1
jeebs
- 325
- 4
I'm currently trying to find out about radiative corrections to Feynman diagrams, where you have a particle traveling along (just represented by a line or whatever) then you can have it momentarily changing into a particle/antiparticle pair or whatever even if energy is not conserved - as long as conservation of energy is recovered within the confines of the energy-time uncertainty principle. Also I am aware that there can be infinitely many higher order corrections, ie. you can draw as many different Feynman diagrams as you can think of as long as you recover your original particle at the end. That's fair enough, I'm familiar with that much.
What I'm not understanding is, what has this got to do with the mass of a particle? For instance, apparently the simplest first order radiative correction to the higgs particle (1 loop) causes a mass increase of 10^19 GeV or something ridiculous. Why do more possible loops mean the mass has to be modified?
I ask this because I'm learning the basics of SUSY and the like, and apparently (correct me if I'm wrong) by introducing supersymmetric partners it enables you to draw more diagrams that give you a very delicate cancellation of the radiative corrections and you end up with sensible particle masses?
What I'm not understanding is, what has this got to do with the mass of a particle? For instance, apparently the simplest first order radiative correction to the higgs particle (1 loop) causes a mass increase of 10^19 GeV or something ridiculous. Why do more possible loops mean the mass has to be modified?
I ask this because I'm learning the basics of SUSY and the like, and apparently (correct me if I'm wrong) by introducing supersymmetric partners it enables you to draw more diagrams that give you a very delicate cancellation of the radiative corrections and you end up with sensible particle masses?