News
New results including 1/fb of LHC data [October 11, 2011]
We update previous frequentist analyses of the CMSSM and NUHM1 parameter spaces to include the public results of searches for supersymmetric signals using
~1/fb of LHC data recorded by ATLAS and CMS and ~0.3/fb of data recorded by LHCb in addition to electroweak precision and B-physics observables.
We also include the constraints imposed by the cosmological dark matter density and the XENON100 search for spin-independent dark matter scattering.
The LHC data set includes ATLAS and CMS searches for jets + missing ET events and for the heavier MSSM Higgs bosons, and the upper limits on
B
s→μμ from LHCb and CMS. The absences of jets + missing ET signals in the LHC data favour heavier mass spectra than in our previous analyses
of the CMSSM and NUHM1, which may be reconciled with (g-2)
μ if tanβ ~40, a possibility that is however under pressure from heavy Higgs searches and
the upper limits on B
s→μμ. As a result, the
p-value for the CMSSM fit is reduced to ~15 (38)%, and that for the NUHM1 to ~16 (38)%, to be compared
with ~9 (49)% for the Standard Model limit of the CMSSM for the same set of observables (dropping (g-2)
μ), ignoring the dark matter relic density in both cases.
We discuss the sensitivities of the fits to the (g-2)
μ and b→sγ constraints, contrasting fits with and without the (g-2)
μ constraint,
and combining
the theoretical and experimental errors for b→sγ linearly or in quadrature. We present predictions for m
gluino, B
s→μμ,
M
h and M
A,
and update predictions for spin-independent dark matter scattering, stressing again the importance of taking into account the uncertainty in the pi-nucleon
sigma term, Σ
πN.
Finally, we present predictions based on our fits for the likely thresholds for sparticle pair production in ee collisions in the CMSSM and NUHM1.
More information:
→ Supersymmetry in Light of 1/fb of LHC Data
→ A selection of results
Read more...
Introduction
The
MasterCode is a computer code that allows to fit GUT based versions of the
Minimal Supersymmetric Standard Model (MSSM) to currently existing
experimental data.
Members of the MasterCode collaboration:
Oliver Buchmüller,
Rick Cavanaugh,
David Colling,
Albert De Roeck,
Matthew Dolan,
John Ellis,
Henning Flächer,
Thomas Hahn,
Sven Heinemeyer,
Gino Isidori,
D. Martinez Santos,
Keith Olive,
Sam Rogerson,
Frederic Ronga,
Georg Weiglein
Codes incorporated into the MasterCode:
