2008/08/31 by John F. Gunion · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.1088/1126-6708/2009/08/032
published as JHEP 0908:032,2009 · 12 pages, 6 figures, revised and expanded
arxiv created 2009/07/27 · openalex publication_date 2009/08/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
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, Δaμ, between the experimentally observed aμ 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 Δaμ. The next-to-minimal supersymmetric model allows more freedom and the light a of the model could explain the full Δaμ if 9.2\gev<\ma<12\gev , or contribute substantially for larger \ma, if \tanb is large.