Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-09-13
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, LaTex file, 2 references added
Scientific paper
We rediscuss the recent controversy on a possible Chern-Simons like term
generated through radiative corrections in QED with a CPT violating term. We
emphasize the fact that any absence of an {\sl a priori} divergence should be
explained by some symmetry or some non-renormalisation theorem : otherwise, no
prediction can be made on the corresponding quantity.
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