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Global frequentist fits to the CMSSM and NUHM1 using the MasterCode framework are updated to include the public results of searches for supersymmetric signals using \sim 1/fb of LHC data recorded by ATLAS and CMS and \sim 0.3/fb of data…

高能物理 - 唯象学 · 物理学 2015-03-13 S. Heinemeyer

Measurements of supersymmetric particle couplings provide important verification of supersymmetry. If some of the superpartners are at the multi-TeV scale, they will escape direct detection at planned future colliders. However, such…

高能物理 - 唯象学 · 物理学 2008-11-26 Hsin-Chia Cheng

Given the increasingly more stringent bounds on Supersymmetry (SUSY) from the LHC searches, we are motivated to explore the situation in which the only accessible SUSY states are the electroweakinos (charginos and neutralinos). In the…

高能物理 - 唯象学 · 物理学 2013-12-16 T. Han , S. Padhi , S. Su

We perform a comparative study of the neutralino dark matter scattering on nucleon in three popular supersymmetric models: the minimal (MSSM), the next-to-minimal (NMSSM) and the nearly minimal (nMSSM). First, we give the predictions of the…

高能物理 - 唯象学 · 物理学 2010-07-14 Junjie Cao , Ken-ichi Hikasa , Wenyu Wang , Jin Min Yang , Li-Xin Yu

We examine various aspects of supersymmetric particle production at linear $e^+e^-$ colliders operating at a centre of mass energy of $\sqrt{s}=500$ GeV, and integrated luminosity of $\int {\cal L}dt=20-50$ fb$^{-1}$. Working within the…

高能物理 - 唯象学 · 物理学 2014-11-17 Howard Baer , Ray Munroe , Xerxes Tata

If supersymmetry (SUSY) is realized at the electroweak scale, its underlying structure and breaking mechanism may be explored with great precision by a future linear $e^+ e^-$ collider (LC) with a clean environment, tunable collision…

高能物理 - 唯象学 · 物理学 2017-08-23 S. Y. Choi

We review the phenomenology of SUSY dark matter in various versions of MSSM, with universal and nonuniversal gaugino masses at the GUT scale. We start with the universal case (CMSSM), where the cosmologically compatible dark matter relic…

高能物理 - 唯象学 · 物理学 2017-05-24 D. P. Roy

The DELPHI experiment at the LEP e+e- collider collected almost 700 pb^-1 at centre-of-mass energies above the Z0 mass pole and up to 208 GeV. Those data were used to search for SUSY in the Anomaly Mediated SUSY Breaking (AMSB) scenario…

高能物理 - 实验 · 物理学 2008-11-26 The DELPHI Collaboration , J. Abdallah

A search for gauge-mediated supersymmetry (SUSY) in final states with photons and large missing transverse momentum is presented. The data sample of pp collisions at $\sqrt{s} = $ 13 TeV was collected with the CMS detector at the CERN LHC…

高能物理 - 实验 · 物理学 2018-03-14 CMS Collaboration

At present, the Standard Model (SM) agrees with almost all collider data. Yet, three finetuning issues -- the Higgs mass problem, the strong CP problem and the cosmological constant problem -- all call for new physics. The most plausible…

高能物理 - 唯象学 · 物理学 2024-05-03 Howard Baer

In split supersymmetry, gauginos and Higgsinos are the only supersymmetric particles which are possibly accessible at foreseeable colliders. While the direct experimental searches, such as LEP and Tevatron experiments, gave robust lower…

高能物理 - 唯象学 · 物理学 2009-01-07 Fei Wang , Wenyu Wang , Jin Min Yang

The search for supersymmetry at Run 1 of LHC has resulted in gluino mass limits m(gluino)>~ 1.3 TeV for the case where m(gluino)<<m(squark) and in models with gaugino mass unification. The increased energy and ultimately luminosity of LHC13…

高能物理 - 唯象学 · 物理学 2015-08-26 Baris Altunkaynak , Howard Baer , Vernon Barger , Peisi Huang

We study and compare the discovery potential for heavy neutral gauge bosons ($Z'$) at various $e^+e^-$ and $p\stackrel{(-)}{p}$ colliders that are planned or have been proposed. Typical discovery limits are for the TEVATRON $\sim 1$ TeV,…

高能物理 - 唯象学 · 物理学 2011-07-19 Stephen Godfrey

The supersymmetry (SUSY) may be one of the most favorable extensions of the standard model (SM), however, so far at LHC no evidence of the SUSY particles were observed. An obvious question is whether they have already emerged, but escaped…

高能物理 - 唯象学 · 物理学 2015-09-02 Lian-Bao Jia , Xing-Dao Guo , Hong-Ying Jin , Xue-Qian Li , Ming-Gang Zhao

The requirement of electroweak naturalness in simple supersymmetric models implies the existence of a cluster of four light higgsinos with mass $\sim 100-300$\,GeV, the lighter the better. While such light compressed spectra may be…

高能物理 - 实验 · 物理学 2020-05-27 Howard Baer , Mikael Berggren , Keisuke Fujii , Jenny List , Suvi-Leena Lehtinen , Tomohiko Tanabe , Jacqueline Yan

This study provides a brief overview of low-energy supersymmetry (SUSY) in light of current experimental constraints, such as collider searches, dark matter searches, and muon $g-2$ measurements. In addition, we survey a variety of low…

高能物理 - 唯象学 · 物理学 2022-01-04 Fei Wang , Wenyu Wang , Jin Min Yang , Yang Zhang , Bin Zhu

Confronted with the LHC data of a Higgs boson around 125 GeV, different models of low energy SUSY show different behaviors: some are favored, some are marginally survived and some are strongly disfavored or excluded. In this note we update…

高能物理 - 唯象学 · 物理学 2015-06-05 Junjie Cao , Zhaoxia Heng , Jin Min Yang , Jingya Zhu

We perform an investigation of the MSSM parameter space at the Fermi scale taking into account available accelerator, non-accelerator and cosmological constraints. Extra assumptions about upper bounds for some of the SUSY particles are also…

高能物理 - 唯象学 · 物理学 2009-10-31 V. A. Bednyakov , H. V. Klapdor-Kleingrothaus

Although the LHC experiments have searched for and excluded many proposed new particles up to masses close to 1 TeV, there are many scenarios that are difficult to address at a hadron collider. This talk will review a number of these…

高能物理 - 实验 · 物理学 2021-11-04 Mikael Berggren

The ATLAS and CMS experiments have recently claimed discovery of a Higgs boson-like particle at ~5 sigma confidence and are beginning to test the Standard Model predictions for its production and decay. In a variety of supersymmetric…

高能物理 - 唯象学 · 物理学 2012-10-29 Kiel Howe , Prashant Saraswat