Naturalness and Fine Tuning in the NMSSM: Implications of Early LHC Results - INSPIRE

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Naturalness and Fine Tuning in the NMSSM: Implications of Early LHC Results

Ulrich Ellwanger
(
- Orsay, LPT
)
,
Gregory Espitalier-Noel
(
- U. Montpellier, L2C
)
,
Cyril Hugonie
(
- U. Montpellier, L2C
)

Jul, 2011

19 pages

Published in:

JHEP 09 (2011) 105

e-Print:

1107.2472 [hep-ph]

DOI:

10.1007/JHEP09(2011)105

Report number:

LPT-ORSAY-11-63,
L2C-11,
LUPM-11-002,
L2C-11-

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Abstract: (arXiv)

We study the fine tuning in the parameter space of the semi-constrained NMSSM, where most soft Susy breaking parameters are universal at the GUT scale. We discuss the dependence of the fine tuning on the soft Susy breaking parameters M_1/2 and m0, and on the Higgs masses in NMSSM specific scenarios involving large singlet-doublet Higgs mixing or dominant Higgs-to-Higgs decays. Whereas these latter scenarios allow a priori for considerably less fine tuning than the constrained MSSM, the early LHC results rule out a large part of the parameter space of the semi-constrained NMSSM corresponding to low values of the fine tuning.

Note:

19 pages, 10 figures, bounds from Susy searches with ~1/fb included

Supersymmetry Phenomenology
Higgs particle: mass
minimal supersymmetric standard model
CERN LHC Coll
ATLAS
CMS
supersymmetry: parameter space

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Figures(9)

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