Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment

Details Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment

2009-01-03

arxiv.org/abs/0901.0306v1

in "Lepton Dipole Moments", B.L. Roberts, W.J. Marciano (eds), Adv. Series on Direcction in High Energy Physics Vol 20, p. 303

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures

Scientific paper

We review the current status of theoretical calculations of the hadronic light-by-light scattering contribution to the muon anomalous magnetic moment. Different approaches and related issues such as OPE constraints and large breaking of chiral symmetry are discussed. Combining results of different models with educated guesses on the errors we come to the estimate $$a^{\rm HLbL}=(10.5\pm 2.6)\times 10^{-10}.$$ The text is prepared as a contribution to the {\it Glasgow White Paper on the present status of the Muon Anomalous Magnetic Moment}.

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