Implications of Improved Higgs Mass Calculations for Supersymmetric Models

Article
Report number	arXiv:1312.5233 ; KCL-PH-TH-2013-41 ; LCTS-2013-28 ; CERN-PH-TH-2013-294 ; MPP-2013-313 ; DESY-13-249 ; FR-PHENO-2013-019 ; UMN-TH-3315-13 ; FTPI-MINN-13-42 ; DESY~13-249 ; SLAC-PUB-15855 ; KCL-PH-TH-2013-41 ; LCTS-2013-28 ; CERN-PH-TH-2013-294 ; MPP-2013-313 ; DESY-13-249 ; FR-PHENO-2013-019 ; UMN-TH-3315-13 ; FTPI-MINN-13-42 ; SLAC-PUB-15855
Title	Implications of Improved Higgs Mass Calculations for Supersymmetric Models
Author(s)	Buchmueller, O. (Imperial Coll., London) ; Dolan, M.J. (SLAC) ; Ellis, J. (King's Coll. London ; CERN) ; Hahn, T. (Munich, Max Planck Inst.) ; Heinemeyer, S. (Cantabria Inst. of Phys.) ; Hollik, W. (Munich, Max Planck Inst.) ; Marrouche, J. (Imperial Coll., London) ; Olive, K.A. (Minnesota U., Theor. Phys. Inst.) ; Rzehak, H. (Freiburg U.) ; de Vries, K.J. (Imperial Coll., London) ; Weiglein, G. (DESY)
Publication	2014-03-18
Imprint	18 Dec 2013
Number of pages	14
Note	Comments: 22 pages, 17 figures 22 pages, 17 figures
In:	Eur. Phys. J. C 74 (2014) 2809
DOI	10.1140/epjc/s10052-014-2809-3
Subject category	Particle Physics - Phenomenology
Abstract	We discuss the allowed parameter spaces of supersymmetric scenarios in light of improved Higgs mass predictions provided by FeynHiggs 2.10.0. The Higgs mass predictions combine Feynman-diagrammatic results with a resummation of leading and subleading logarithmic corrections from the stop/top sector, which yield a significant improvement in the region of large stop masses. Scans in the pMSSM parameter space show that, for given values of the soft supersymmetry-breaking parameters, the new logarithmic contributions beyond the two-loop order implemented in FeynHiggs tend to give larger values of the light CP-even Higgs mass, M_h, in the region of large stop masses than previous predictions that were based on a fixed-order Feynman-diagrammatic result, though the differences are generally consistent with the previous estimates of theoretical uncertainties. We re-analyze the parameter spaces of the CMSSM, NUHM1 and NUHM2, taking into account also the constraints from CMS and LHCb measurements of B_s to \mu+\mu- and ATLAS searches for MET events using 20/fb of LHC data at 8 TeV. Within the CMSSM, the Higgs mass constraint disfavours tan beta lesssim 10, though not in the NUHM1 or NUHM2.
Copyright/License	publication: © 2014-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³ preprint: © 2013-2024 CERN (License: CC-BY-3.0)

$\it The differences between \Mh\ calculated using {\tt FeynHiggs~2.10.0} and {\tt FeynHiggs~2.8.6}, as a function of the {\tt FeynHiggs~2.8.6} value, for third-generation squark masses $\msqt =$ 0.5~TeV (upper left), 1~TeV (upper right), 2~TeV (middle left), 3~TeV (middle right), 4~TeV (lower left) and 5~TeV (lower right).$ $\it The allowed regions in the $(m_{1/2}, m_0)$ planes for $\tb = 10$ and $A_0 = 0$ (upper left), $\tb = 10$ and $A_0 = 2.5 m_0$ (upper right), $\tb = 30$ and $A_0 = 0$ (lower left) and $\tb = 30$ and $A_0 = 2.5 m_0$ (lower right). The line styles and shadings are described in the text. The section of the dark blue coannihilation strip in the lower right panel in the range $m_{1/2} \in (840, 1050) \gev$ is compatible with the constraints from \bmm\ (green line) and the ATLAS 20/fb \ETslash\ search (purple line), as well as with the LHC \Mh\ measurement. Better consistency with all the constraints (except \gmt) is found if the improved {\tt FeynHiggs~2.10.0} code is used, for $\tb = 30$ and $A_0 = 2.5 m_0$.$ $\it The allowed regions in the $(m_{1/2}, m_0)$ planes for $\tb = 10$ and $A_0 = 0$ (upper left), $\tb = 10$ and $A_0 = 2.5 m_0$ (upper right), $\tb = 30$ and $A_0 = 0$ (lower left) and $\tb = 30$ and $A_0 = 2.5 m_0$ (lower right). The line styles and shadings are described in the text. The section of the dark blue coannihilation strip in the lower right panel in the range $m_{1/2} \in (840, 1050) \gev$ is compatible with the constraints from \bmm\ (green line) and the ATLAS 20/fb \ETslash\ search (purple line), as well as with the LHC \Mh\ measurement. Better consistency with all the constraints (except \gmt) is found if the improved {\tt FeynHiggs~2.10.0} code is used, for $\tb = 30$ and $A_0 = 2.5 m_0$.$ Show more plots

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