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In the Minimal Supersymmetric Standard Model, the higgsinos can have masses around the electroweak scale, while the other supersymmetric particles have TeV-scale masses. This happens in models of gauge-mediated SUSY breaking with a high…

High Energy Physics - Phenomenology · Physics 2012-05-08 F. Brümmer

We consider extensions of the Minimal Supersymmetric Standard Model (MSSM) where the extra degrees of freedom interact weakly with the Higgs sector. These models allow to relax the tension between the lower bound on the lightest CP even…

High Energy Physics - Phenomenology · Physics 2010-11-19 Marcela Carena , Eduardo Pontón , José Zurita

In this talk we briefly review the current CDMS/XENON constraints on the neutralino dark matter in three popular supersymmetric models: the minimal (MSSM), the next-to-minimal (NMSSM) and the nearly minimal (nMSSM). The constraints from the…

High Energy Physics - Phenomenology · Physics 2011-08-05 Jin Min Yang

We study the parameter space of the semi-constrained NMSSM, compatible with constraints on the Standard Model like Higgs mass and signal rates, constraints from searches for squarks and gluinos, a dark matter relic density compatible with…

High Energy Physics - Phenomenology · Physics 2015-06-19 Ulrich Ellwanger , Cyril Hugonie

We present preliminary results from the latest global fit analysis of the constrained minimal supersymmetric standard model (CMSSM) performed within the Fittino framework. The fit includes low-energy and astrophysical observables as well as…

Particle physics models with Natural Supersymmetry are characterized by a superpotential parameter \mu \sim m_h \sim125$ GeV, while third generation squarks have mass <0.5-1.5 TeV. Gluinos should be lighter than several TeV so as not to…

High Energy Physics - Phenomenology · Physics 2015-06-04 Howard Baer , Vernon Barger , Peisi Huang , Xerxes Tata

Weak scale supersymmetry (SUSY) remains a prime explanation for the radiative stability of the Higgs field. A natural account of the Higgs boson mass, however, strongly favors extensions of the Minimal Supersymmetric Standard Model (MSSM).…

High Energy Physics - Phenomenology · Physics 2017-09-13 Genevieve Belanger , Cedric Delaunay , Andreas Goudelis

We examine various direct and indirect experimental constraints on the nearly minimal supersymmetric standard model (nMSSM) and obtain the following observations: (i) Current experiments stringently constrain the parameter space, setting a…

High Energy Physics - Phenomenology · Physics 2009-05-29 Junjie Cao , Heather E. Logan , Jin Min Yang

The Exceptional Supersymmetric (SUSY) Standard Model predicts three families of Higgs doublets plus three Higgs singlets, where one family develops vacuum expectation values (VEVs), while the remaining two which do not are called Inert. The…

High Energy Physics - Phenomenology · Physics 2011-05-05 J. P. Hall , S. F. King , R. Nevzorov , S. Pakvasa , M. Sher

We investigate the constraints on Supersymmetry arising from available precision measurements using a global fit approach. When interpreted within minimal supergravity (mSUGRA), the data provide significant constraints on the masses of…

High Energy Physics - Phenomenology · Physics 2014-11-20 P. Bechtle , K. Desch , M. Uhlenbrock , P. Wienemann

We examine the parameter space of the purely phenomenological minimal super- symmetric standard model (MSSM), without assuming any supersymmetry breaking scheme. We find that a large region of the parameter space can indeed yield the…

High Energy Physics - Phenomenology · Physics 2012-02-29 Nishita Desai , Biswarup Mukhopadhyaya , Saurabh Niyogi

Recently, the LEP collaborations have reported a lower bound on a Standard Model-like Higgs boson of order 89 GeV. We discuss the implications of this bound for the minimal supersymmetric extension of the Standard Model (MSSM). In…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Carena , P. H. Chankowski , S. Pokorski , C. E. M. Wagner

The current experimental lower bound on the Higgs mass significantly restricts the allowed parameter space in most realistic supersymmetric models, with the consequence that these models exhibit significant fine-tuning. We propose a…

High Energy Physics - Phenomenology · Physics 2014-11-17 Andreas Birkedal , Z. Chacko , Mary K. Gaillard

The recent discovery of a 125 GeV Higgs-like resonance at LHC, coupled with the lack of evidence for weak scale supersymmetry (SUSY), have severely constrained SUSY models such as mSUGRA/CMSSM. As LHC probes deeper into SUSY model parameter…

High Energy Physics - Phenomenology · Physics 2015-06-11 Howard Baer , Vernon Barger , Peisi Huang , Dan Mickelson , Azar Mustafayev , Xerxes Tata

Recently the ATLAS and CMS collaborations presented preliminary results of Standard Model Higgs searches and reported excesses of events for a Higgs boson at 124-126 GeV. Such a Higgs mass can be naturally realized, simultaneously…

High Energy Physics - Phenomenology · Physics 2013-05-30 Motoi Endo , Koichi Hamaguchi , Sho Iwamoto , Norimi Yokozaki

Recent results from Higgs boson and supersymmetry searches at the Large Hadron Collider provide strong new motivations for supersymmetric theories with heavy superpartners. We reconsider focus point supersymmetry (FP SUSY), in which all…

High Energy Physics - Phenomenology · Physics 2013-05-30 Jonathan L. Feng , Konstantin T. Matchev , David Sanford

The Minimal Supersymmetric Extension of the Standard Model (MSSM) is a well motivated theoretical framework, which contains an extended Higgs sector, including a light Higgs with Standard Model-like properties in most of the parameter…

High Energy Physics - Phenomenology · Physics 2015-03-19 Stefania Gori , Pedro Schwaller , Carlos E. M. Wagner

We examine the current lower bound on the charged Higgs boson mass in the Minimal Supersymmetric Standard Model. By applying direct search constraints on the neutral Higgs bosons and other supersymmetric states, as well as a number of…

High Energy Physics - Phenomenology · Physics 2009-01-22 Brian Dudley , Christopher Kolda

We describe a likelihood analysis using MasterCode of variants of the MSSM in which the soft supersymmetry-breaking parameters are assumed to have universal values at some scale $M_{in}$ below the supersymmetric grand unification scale…

We consider supersymmetric models in which the lightest Higgs scalar can decay invisibly consistent with the constraints on the $126$~GeV state discovered at the CERN LHC. We consider the invisible decay in the minimal supersymmetric…

High Energy Physics - Phenomenology · Physics 2013-06-24 B. Ananthanarayan , Jayita Lahiri , P. N. Pandita , Monalisa Patra