%0 Journal Article
%T Hadronic Light-by-Light Contribution to the Muon $g-2$
%A Johan Bijnens
%A Elisabetta Pallante
%A Joaquim Prades
%J Physics
%D 1995
%I arXiv
%R 10.1103/PhysRevLett.75.1447
%X Mistake in FORTRAN program corrected. The numerical results and conclusions are changed significantly: We present a calculation of the hadronic light-by-light contributions to the muon $g-2$ in the $1/N_c$ expansion. We have used an Extended NJL model and introduced an explicit cut-off for the high energy region. We have then critically studied the relative size of the high energy contributions. Although we find them large we can give a conservative estimate of the light-by-light contribution to $a_\mu$ which is $-(11\pm5) \cdot 10^{-10}$. This is between two and three sigmas the expected experimental uncertainty at the forthcoming BNL experiment.
%U http://arxiv.org/abs/hep-ph/9505251v2