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https://hdl.handle.net/2440/96522
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Type: | Journal article |
Title: | On naturalness of the MSSM and NMSSM |
Author: | Kang, Z. Li, J. Li, T. |
Citation: | The Journal of High Energy Physics, 2012; 2012(11):24-1-24-28 |
Publisher: | Springer Verlag |
Issue Date: | 2012 |
ISSN: | 1029-8479 1029-8479 |
Statement of Responsibility: | Zhaofeng Kang, Jinmian Li, and Tianjun Li |
Abstract: | With a bottom-up approach, we consider naturalness in the MSSM and NMSSM. Assuming the light stops, the LHC gluino search implies that the degree of fine tuning in both models is less than 2.5%. Taking the LHC hints for the SM-like Higgs boson mass m h ~ 125 GeV seriously, we find that naturalness will favor the NMSSM. We study the Higgs boson mass for several scenarios in the NMSSM: (1) A large λ and the doublet-singlet Higgs boson mixing effect pushing upward or pulling downward m h . The former case can readily give the di-photon excess of the Higgs boson decay whereas the latter case can not. However, we point out that the former case has a new large fine-tuning related to strong λ−RGE running effect and vacuum stability. (2) A small λ and the mixing effect pushing m h upward. Naturalness status becomes worse and no significant di-photon excess can be obtained. In these scenarios, the lightest supersymmetric particle (LSP) as a dark matter candidate is strongly disfavored by the XENON100 experiment. Even if the LSP can be a viable dark matter candidate, there does exist fine-tuning. The above naturalness evaluation is based on a high mediation scale for supersymmetry breaking, whereas for a low mediation scale, fine-tuning can be improved by about one order. |
Keywords: | Supersymmetry Phenomenology |
Rights: | © SISSA 2012 |
DOI: | 10.1007/JHEP11(2012)024 |
Published version: | http://dx.doi.org/10.1007/jhep11(2012)024 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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