A light CP-odd Higgs boson and the muon anomalous magnetic moment

Abstract

We amalgamate the many experimental limits on the $ab\anti b$ coupling of a light CP-odd Higgs boson, $a$, including model-dependence coming from the ratio of the $at\anti t$ to the $a b\anti b$ coupling. We then employ these limits to analyze the extent to which a light $a$ can make a significant contribution to the discrepancy, $\Delta a_{\mu }$, between the experimentally observed $a_{\mu }$ and that predicted by the standard model. In a "model-independent" framework and in the context of a general two-Higgs-doublet model this is a significant possibility. In contrast, the minimal supersymmetric model is too strongly constrained (after combining experimental and theoretical input) to allow a CP-odd-$a$ explanation of $\Delta a_{\mu }$. The next-to-minimal supersymmetric model allows more freedom and the light $a$ of the model could explain the full $\Delta a_{\mu }$ if $9.2\gev<\ma<12\gev $, or contribute substantially for larger $\ma$, if $\tanb$ is large.

12 pages, 6 figures, revised and expanded

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Cited by in corpus (11)

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• Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at sqrt(s) = 7 TeV
• New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios
• Challenges for an axion explanation of the muon $g-2$ measurement
• The Tiny (g-2) Muon Wobble from Small-$\mu$ Supersymmetry
• Precision measurements, dark matter direct detection and LHC Higgs searches in a constrained NMSSM
• Rare Z-decay into light CP-odd Higgs bosons: a comparative study in different new physics models
• Muon $g-2$ in a two-Higgs-doublet model with a type-II seesaw mechanism
• Unparticle-Induced Lepton Flavor Violating Decays τ^- ->l^- (V^0, ~P^0)
• The ALP explanation to muon $(g-2)$ and its test at future Tera-$Z$ and Higgs factories
• Leptonic probes of Alternative Left-Right Symmetric Models