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We consider light top squarks (stops) in the minimal supersymmetric Standard Model at the Large Hadron Collider. Here, we assume that the lightest neutralino is the lightest supersymmetric particle (LSP) and the lighter stop is the…

高能物理 - 唯象学 · 物理学 2013-05-30 Manuel Drees , M. Hanussek , Jong Soo Kim

We demonstrate that the $3\sigma$ excess observed by ATLAS in the Z + MET channel can be explained within the context of the MSSM. Using the freedom inherent in the pMSSM, we perform a detailed analysis of the parameter space and find a…

高能物理 - 唯象学 · 物理学 2015-10-28 M. Cahill-Rowley , J. L. Hewett , A. Ismail , T. G. Rizzo

Using the GAMBIT global fitting framework, we constrain the MSSM with an eV-scale gravitino as the lightest supersymmetric particle, and the six electroweakinos (neutralinos and charginos) as the only other light new states. We combine 15…

The results of a search for gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton--proton collision data at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV are presented.…

高能物理 - 实验 · 物理学 2016-11-11 ATLAS Collaboration

Search results are presented for physics beyond the standard model in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9…

高能物理 - 实验 · 物理学 2018-07-18 CMS Collaboration

We review the status of the phenomenology of light neutralinos in an effective Minimal Supersymmetric extension of the Standard Model (MSSM) at the electroweak scale, in light of new results obtained at the CERN Large Hadron Collider. First…

高能物理 - 唯象学 · 物理学 2013-05-30 A. Bottino , N. Fornengo , S. Scopel

We present an update of a search for supersymmetry in final states containing jets, missing transverse momentum, and one isolated electron or muon, using 1.04 fb^-1 of proton-proton collision data at sqrt{s} = 7 TeV recorded by the ATLAS…

高能物理 - 实验 · 物理学 2012-08-27 ATLAS Collaboration

This Letter presents the first search for supersymmetry in final states containing one isolated electron or muon, jets, and missing transverse momentum from sqrt{s} = 7 TeV proton-proton collisions at the LHC. The data were recorded by the…

高能物理 - 实验 · 物理学 2012-08-27 The ATLAS Collaboration

We utilize the recent LHC-13 TeV data to study the lower mass bound on top-squark (stop) in natural supersymmetry. We recast the LHC sparticle inclusive search of $(\ge 1){\rm jets} + E^{miss}_T$ with $\alpha_T$ variable, the direct stop…

高能物理 - 唯象学 · 物理学 2017-03-08 Chengcheng Han , Jie Ren , Lei Wu , Jin Min Yang , Mengchao Zhang

The first search for supersymmetry in the vector-boson fusion topology is presented. The search targets final states with at least two leptons, large missing transverse momentum, and two jets with a large separation in rapidity. The data…

高能物理 - 实验 · 物理学 2016-05-18 CMS Collaboration

If supersymmetry (SUSY) has a compressed spectrum then the current mass limits from the LHC can be drastically reduced. We consider a possible 'worst case' scenario where the gluino and/or squarks are degenerate with the lightest SUSY…

高能物理 - 唯象学 · 物理学 2015-06-05 Herbi K. Dreiner , Michael Krämer , Jamie Tattersall

A combination of the results of several searches for the electroweak production of the supersymmetric partners of standard model bosons, and of charged leptons, is presented. All searches use proton-proton collision data at $\sqrt{s}$ = 13…

高能物理 - 实验 · 物理学 2024-06-10 CMS Collaboration

A multitude of searches have already been performed by the ATLAS and CMS collaborations at the LHC to probe the heavy Higgses of the Minimal Supersymmetric Standard Model (MSSM) through their decay to the Standard Model particles. In this…

高能物理 - 唯象学 · 物理学 2016-10-26 Rahool K. Barman , Biplob Bhattacherjee , Amit Chakraborty , Arghya Choudhury

The first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying $\tau$ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. These event…

高能物理 - 实验 · 物理学 2020-02-19 CMS Collaboration

Recently the ATLAS experiment announced a 3 $\sigma$ excess at the Z-peak consisting of 29 pairs of leptons together with two or more jets, $E_T^{\rm miss}> 225$ GeV and $H_T \geq 600$ GeV, to be compared with $10.6 \pm 3.2$ expected lepton…

高能物理 - 唯象学 · 物理学 2016-03-23 G. Barenboim , J. Bernabeu , V. A. Mitsou , E. Romero , O. Vives

Higgsinos and Wino have strong motivations for being Dark Matter (DM) candidates in supersymmetry, but their annihilation cross sections are quite large. For thermal generation and a single component DM setup the higgsinos or wino may have…

高能物理 - 唯象学 · 物理学 2017-10-25 Manimala Chakraborti , Utpal Chattopadhyay , Sujoy Poddar

We consider a scenario where light bino is the next-to-lightest supersymmetric particle (NLSP) and gravitino/axino is the lightest superysmmetric particle (LSP). For a bino mass less than or around hundred GeV, it can be pair produced at…

高能物理 - 唯象学 · 物理学 2021-07-14 Junmou Chen , Chengcheng Han , Jin Min Yang , Mengchao Zhang

We consider a Minimal Supersymmetric Standard Model scenario in which the only light superparticles are a bino-like dark matter candidate and a nearly-degenerate slepton. It is notoriously difficult to probe this scenario at the Large…

Searches for pair production of squarks, sleptons, charginos, and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies from 188.6 to 201.6 GeV. No evidence for any such signals is…

高能物理 - 实验 · 物理学 2012-08-27 ALEPH Collaboration

Results from a search for supersymmetry in events with four or more leptons including electrons, muons and taus are presented. The analysis uses a data sample corresponding to 20.3 $fb^{-1}$ of proton--proton collisions delivered by the…

高能物理 - 实验 · 物理学 2014-12-05 ATLAS Collaboration