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Phys. Rev. D 76, 095006 (2007) [26 pages]Next-to-minimal supersymmetric model solution to the fine-tuning problem, precision electroweak constraints, and the largest CERN LEP Higgs event excess
Received 14 June 2007; published 14 November 2007
We present an extended study of how the next-to-minimal supersymmetric model easily avoids fine-tuning in electroweak symmetry breaking for a SM-like light Higgs with mass in the vicinity of 100 GeV, as beautifully consistent with precision electroweak data, while escaping LEP constraints due to the dominance of h-->aa decays with ma<2mb so that a-->tau+tau- or jets. The residual ~10% branching ratio for h-->b[overline b] explains perfectly the well-known LEP excess at mh~100 GeV. Details of model parameter correlations and requirements are discussed as a function tanbeta. Comparisons of fine-tuning in the NMSSM to that in the MSSM are presented. We also discuss fine-tuning associated with scenarios in which the a is essentially pure singlet, has mass ma>30 GeV, and decays primarily to gammagamma leading to an h-->aa-->4gamma Higgs signal. ©2007 The American Physical Society REFERENCES (26)
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S. G. Kim, N. Maekawa, A. Matsuzaki, K. Sakurai, A. I. Sanda, and T. Yoshikawa, Phys. Rev. D 74, 115016 (2006); CITING ARTICLESFor access to citing articles, you need to log in.
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