LargeN expansion of QED: asymptotic photon propagator and contributions to the muon anomaly,for any number of loops |
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| Authors: | D J Broadhurst |
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| Institution: | 1. Physics Department, Open University, MK7 6AA, Milton Keynes, UK
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| Abstract: | We calculate analytical contributions to then-loop asymptotic photon propagator from diagrams withn–1 electron loops, i.e. theO(1/N) terms in the largeN limit. The corresponding contributions to the on-shell  -function, ( )= 6 log / logm reduced to rational combinations of 
s
=
p
p
–s
. For the -function of the MOM scheme (i.e. the Gell-Man-Low function) we obtain theO(1/N) terms of
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