The muon g-2 discrepancy: errors or new physics?

Details The muon g-2 discrepancy: errors or new physics? The muon g-2 discrepancy: errors or new physics?

2008-09-24

arxiv.org/abs/0809.4062v1

AIP Conf.Proc.1078:378-381,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages. Invited talk at 16th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY0

Scientific paper

10.1063/1.3051967

After a brief review of the muon g-2 status, we discuss hypothetical errors in the Standard Model prediction that could explain the present discrepancy with the experimental value. None of them looks likely. In particular, an hypothetical increase of the hadroproduction cross section in low-energy e^+e^- collisions could bridge the muon g-2 discrepancy, but is shown to be unlikely in view of current experimental error estimates. If, nonetheless, this turns out to be the explanation of the discrepancy, then the 95% CL upper bound on the Higgs boson mass is reduced to about 130 GeV which, in conjunction with the experimental 114.4 GeV 95% CL lower bound, leaves a narrow window for the mass of this fundamental particle.

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