A Light Higgs Boson Explanation for the g-2 Crisis

Abstract

A light CP-even Higgs boson with a mass of around 10 GeV could explain the recent BNL measurement of the muon anomalous magnetic moment. This observation is based on a general CP-conserving two Higgs doublet extension of the Standard Model with no tree-level flavor changing neutral current couplings. The Higgs mass is constrained by experiments at CESR and LEP to be less than twice the lightest B-meson mass and greater than (roughly) the Upsilon mass. It may be possible to exclude or discover such a Higgs boson by fully analyzing the existing LEP data.

6 pages, 1 figure, Talk given at the XXXVIth Rencontres de Moriond ``Electroweak Interactions and UnifiedTheories'', Les Arcs 1800, March 10-17, 2001; references corrected