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Recent work on calculating string theory landscape statistical predictions for the Higgs and sparticle mass spectrum from an assumed power-law soft term distribution yields an expectation for m(h)~ 125 GeV with sparticles (save light…

High Energy Physics - Phenomenology · Physics 2021-03-03 Howard Baer , Vernon Barger , Shadman Salam , Dibyashree Sengupta

Complete one-loop results for the decay widths of neutral Higgs bosons (h_a) into lighter neutral Higgs bosons (h_b, h_c) are presented for the MSSM with complex parameters. The results are obtained in the Feynman-diagrammatic approach,…

High Energy Physics - Phenomenology · Physics 2008-11-26 K. E. Williams , G. Weiglein

The hMSSM is a special parameterization of the minimal supersymmetric extension of the Standard Model (MSSM) in which the mass of the lightest Higgs boson is automatically set to the LHC measured value, $M_h\!\!=\!\! 125$\,GeV, by adjusting…

High Energy Physics - Phenomenology · Physics 2023-05-31 Giorgio Arcadi , Abdelhak Djouadi , Hong-Jian He , Jean-Loic Kneur , Rui-Qing Xiao

The Constrained Minimal Supersymmetric Standard Model (CMSSM) is one of the simplest and most widely-studied supersymmetric extensions to the standard model of particle physics. Nevertheless, current data do not sufficiently constrain the…

High Energy Physics - Phenomenology · Physics 2015-03-13 Yashar Akrami , Pat Scott , Joakim Edsjö , Jan Conrad , Lars Bergström

We evaluate the amount of fine-tuning in constrained versions of the minimal supersymmetric standard model (MSSM), with different boundary conditions at the GUT scale. Specifically we study the fully constrained version as well as the cases…

High Energy Physics - Phenomenology · Physics 2017-03-09 Graham G. Ross , Kai Schmidt-Hoberg , Florian Staub

We investigate the impact of recent limits from LHC searches for supersymmetry and from direct and indirect searches for dark matter on global Bayesian inferences of the parameter space of the Constrained Minimal Supersymmetric Standard…

High Energy Physics - Phenomenology · Physics 2013-05-30 Leszek Roszkowski , Enrico Maria Sessolo , Yue-Lin Sming Tsai

Motivated by the recent LHC hints of a Higgs boson around 125 GeV, we assume a SM-like Higgs with the mass 123-127 GeV and study its implication in low energy SUSY by comparing the MSSM and NMSSM. We consider various experimental…

High Energy Physics - Phenomenology · Physics 2015-06-04 Junjie Cao , Zhaoxia Heng , Jin Min Yang , Yanming Zhang , Jingya Zhu

The CMS and ATLAS Collaborations have recently published the results of initial direct LHC searches for supersymmetry analyzing ~ 35/pb of data taken at 7 TeV in the centre of mass. We incorporate these results into a frequentist analysis…

High Energy Physics - Phenomenology · Physics 2015-05-27 O. Buchmueller , R. Cavanaugh , D. Colling , A. De Roeck , M. J. Dolan , J. R. Ellis , H. Flacher , S. Heinemeyer , G. Isidori , K. Olive , S. Rogerson , F. Ronga , G. Weiglein

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…

We make a frequentist analysis of the parameter space of the NUHM2, in which the soft supersymmetry (SUSY)-breaking contributions to the masses of the two Higgs multiplets, $m^2_{H_{u,d}}$, vary independently from the universal soft…

We explore the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), allowing the soft supersymmetry-breaking masses of the Higgs multiplets, m_{1,2}, to be non-universal (NUHM). Compared with the constrained…

High Energy Physics - Phenomenology · Physics 2009-09-29 J. Ellis , T. Falk , K. A. Olive , Y. Santoso

We investigate the expectations for the light Higgs signal in the MSSM in different search channels at the LHC. After taking into account dark matter and flavor constraints in the MSSM with eleven free parameters, we show that the light…

High Energy Physics - Phenomenology · Physics 2015-06-03 D. Albornoz Vasquez , G. Belanger , R. M. Godbole , A. Pukhov

The prospects for detecting a candidate supersymmetric dark matter particle at the LHC are reviewed, and compared with the prospects for direct and indirect searches for astrophysical dark matter, on the basis of a frequentist analysis of…

High Energy Physics - Phenomenology · Physics 2010-11-02 John Ellis

We compare updated predictions for the elastic scattering of supersymmetric neutralino dark matter with the improved experimental upper limit recently published by CDMS II. We take into account the possibility that the \pi-nucleon \Sigma…

High Energy Physics - Phenomenology · Physics 2010-04-06 John Ellis , Keith A. Olive , Yudi Santoso , Vassilis C. Spanos

We analyze the impact of data from the full Run 1 of the LHC at 7 and 8 TeV on the CMSSM with mu > 0 and < 0 and the NUHM1 with mu > 0, incorporating the constraints imposed by other experiments such as precision electroweak measurements,…

The "golden region'' in the MSSM parameter space is the region where the experimental constraints are satisfied and the amount of fine-tuning is minimized. In this region, the stop trilinear soft term is large, leading to a significant mass…

High Energy Physics - Phenomenology · Physics 2007-10-24 Maxim Perelstein , Christian Spethmann

In this analysis we explore the phenomenological constraints of models with non-holomorphic soft SUSY breaking terms in a beyond the MSSM scenario having identical particle content. The model referred as NHSSM shows various promising…

High Energy Physics - Phenomenology · Physics 2016-11-03 Utpal Chattopadhyay , Abhishek Dey

The constraints imposed on the Minimal Supersymmetric Standard Model (MSSM) parameter space by the Large Hadron Collider (LHC) Higgs mass limit and gluino mass lower bound are revisited. We also analyze the thermal relic abundance of…

High Energy Physics - Phenomenology · Physics 2016-01-12 W. Abdallah , S. Khalil

The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for a variety of experimental data. The lighest supersymmetric particle (LSP), which we take as the lightest neutralino, $\tilde \chi_1^0$, can…

High Energy Physics - Phenomenology · Physics 2021-07-30 Manimala Chakraborti , Sven Heinemeyer , Ipsita Saha

Using a Markov chain Monte Carlo approach, we find the allowed parameter space of a MSSM model with seven free parameters. In this model universality conditions at the GUT scale are imposed on the gaugino sector. We require in particular…

High Energy Physics - Phenomenology · Physics 2009-11-13 G. Belanger , F. Boudjema , A. Pukhov , R. K. Singh