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Electron mass radiative corrections

by Safinaz
Tags: corrections, electron, mass, radiative
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Safinaz
#1
Apr15-14, 03:10 PM
P: 57
Hi all,

I'd like to know how the chiral symmetry protect the electron mass in the one-loop calculation of the electron self energy
and we finally get the mass radiative corrections as a logarithmic divergence.

It's known that the Dirac particle mass term : ## m \bar{\psi} \psi## could be written as ## m (\bar{\psi}_L \psi_R + \bar{\psi}_R \psi_L ) ##, so is there a simple explanation why the chiral symmetry keeps ## \Delta m \sim ln \Lambda \sim m ##, where ##\Lambda## the cutoff.

Bests,
Safinaz
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andrien
#2
Apr16-14, 10:09 AM
P: 1,020
Chiral symmetry just protects the electron from getting mass, if it started massless. It has nothing to do with the fact that loop correction to electron diverges logarithmically.


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