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+====== TTP09-21 Introduction to effective field theories. 1. Heisenberg-Euler effective theory, decoupling of heavy flavours ======
+   <hidden TTP09-21  Introduction to effective field theories. 1. Heisenberg-Euler effective theory, decoupling of heavy flavours > This is the first part of lectures about effective field theories.
+ Decoupling of heavy-particle loops is considered
+ (heavy leptons in QED, heavy quarks in QCD).
+ </hidden>
+|**Andrey Grozin**  |
+|**     Lectures given at Conference **  |
+| {{preprints:2009:ttp09-21.pdf|PDF}} {{preprints:2009:ttp09-21.ps|PostScript}} [[http://arxiv.org/abs/0908.4392|arXiv]]   |
+| |