A search for the production of a pair of top squarks at the LHC is presented. This search targets a region of parameter space where the kinematics of top squark pair production and top quark pair production are very similar, because of the mass difference between the top squark and the neutralino being close to the top quark mass. The search is performed with 35.9 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of $\sqrt{s} =$ 13 TeV, collected by the CMS detector in 2016, using events containing one electron-muon pair with opposite charge. The search is based on a precise estimate of the top quark pair background, and the use of the $M_\mathrm{T2}$ variable, which combines the transverse mass of each lepton and the missing transverse momentum. No excess of events is found over the standard model predictions. Exclusion limits are placed at 95% confidence level on the production of top squarks up to masses of 208 GeV for models with a mass difference between the top squark and the lightest neutralino close to that of the top quark.
Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 20.3 $fb^{-1}$ of $\sqrt{s}$ = 8 TeV proton-proton collision data
Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collision data
Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
Search for direct top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in sqrt(s) = 7 TeV pp collisions using 4.7 fb-1 of ATLAS data
A search for top squarks with R-parity-violating decays to all-hadronic final states with the ATLAS detector in $\sqrt{s}$ = 8 TeV proton-proton collisions
Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb$^{-1}$ of $\sqrt{s}$=13 TeV $pp$ collision data with the ATLAS detector
Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector
Search for the pair production of third-generation squarks with two-body decays to a bottom or charm quark and a neutralino in proton-proton collisions at sqrt(s) = 13 TeV
Search for squarks and gluinos in final states with jets and missing transverse momentum using 139 fb$^{-1}$ of $\sqrt{s}$ =13 TeV $pp$ collision data with the ATLAS detector
Search for pair-produced third-generation squarks decaying via charm quarks or in compressed supersymmetric scenarios in $pp$ collisions at $\sqrt{s}=8~$TeV with the ATLAS detector
本文报道了通过直接产生第三代方子来寻找超对称性的结果，使用了2012年在LHC的ATLAS实验中记录的$\sqrt{s} = 8$ TeV质子-质子碰撞数据的$20.3$ fb $^{-1}$。基于单喷流和$c$标记事件选择的两种不同的分析策略进行优化的灵敏度直接顶部夸克对产生的衰变通道的粲夸克和最轻的中性伴（$\tilde{t}_1 \to c + \tildeχ_{1}^{0}$）在顶部夸克-中性伴质量参数空间。没有观察到超过标准模型背景预期的情况。结果被解释的上下文中的直接对生产的顶部squarks和（$m_{\tilde{t}_1}$，$m_{\tildeχ_{1}^{0}}$）参数空间中的排除限制。在95 $\%$置信水平下，任意中性伴子质量的运动学边界内，排除了质量高达约240 GeV的顶夸克。对于200 GeV的中性伴子质量，排除了高达270 GeV的顶级夸克质量。在顶夸克和最轻的中性伴子的质量几乎简并的情况下，顶夸克质量高达260 GeV被排除在外。从单喷流分析的结果也解释在压缩的情况下，顶部夸克对生产的衰变通道$\tilde{t}_1 \to b + ff^{'} + \tildeχ^{0}_{1}$和sbottom对生产与$\tilde{b}_1 \to b + \tildeχ^{0}_{1}$，导致类似的排斥近质量简并的第三代squarks和最轻的中性伴子。本…
Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in sqrt{s}=8 TeV pp collisions with the ATLAS detector
本文报道了对标准模型第三代夸克超对称伴子对产生的研究结果。这个搜索使用了20.1 fb-1的pp碰撞在sqrt{s}=8 TeV收集的ATLAS实验在大型强子对撞机。最轻的底部和顶部的正方形（分别为b1和t1）的搜索在一个最终的状态与大失踪的横向动量和两个喷流确定为源自b夸克。未发现超出预期标准模型背景水平的事件。结果用于设置超出标准模型的过程的可见横截面的上限。排除限制在95%的置信水平上的质量的第三代squarks来自现象学超对称R-奇偶守恒模型中，无论是底部或顶部squark是最轻的squark。假设b1通过b1->b chi 0衰减，t通过t1->b chipm衰减，由于chipm和chi 0之间的小质量分裂，chipm的后续衰减产物不可检测。
Searches for pair production of charginos and top squarks in final states with two oppositely charged leptons in proton-proton collisions at $\sqrt{s} =$ 13 TeV
Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using $\sqrt{s}=8$ TeV proton--proton collision data
Search for direct pair production of top squarks in $pp$ collisions at $\sqrt{s}= 13$ TeV and $13.6$ TeV in events with two oppositely charged leptons using the ATLAS detector
EUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN)（欧洲核子研究中心（CERN））
Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable
一个包容性的搜索进行超对称性的最后状态包含射流和横向动量，pt[小姐]，由于生产未观察到的弱相互作用粒子在PP碰撞在一个中心的质量能量为8 TeV的明显的不平衡。由欧洲核子研究中心大型强子对撞机的CMS探测器记录的数据对应于18.5毫微微巴恩斯的积分亮度。无量纲运动学变量α [T]用于区分与未观测到的粒子相关的真实pt[miss]事件和由射流能量误测量引起的pt[miss]假值。没有观察到超过预期标准模型背景的事件产额。结果被解释在参数空间上的几个简化模型的超对称性，假设对生产的顶方的约束。搜寻提供了对广泛的顶夸克衰变模式的灵敏度，包括两体衰变顶夸克到c chi 0，其中c是粲夸克，chi 0是最轻的中性伴子，以及四体衰变顶夸克到b f f'chi 0，其中b是底夸克，f和f'是中间离壳W玻色子衰变产生的费米子。这些模式占主导地位的情况下，顶夸克和最轻的中性伴子几乎简并的质量。对于这些模式，顶方与质量大至260和230 GeV的被排除在外，分别为两个和四体衰变。
Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in sqrt(s)=8 TeV pp collisions with the ATLAS detector
Search for squarks and gluinos in $pp$ collisions at $\sqrt{s} = 13$ TeV and $13.6$ TeV in events with $τ$-leptons, jets and missing transverse momentum using the ATLAS detector
EUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN)（欧洲核子研究中心（CERN））
利用 ATLAS 探测器在 13 TeV 和 13.6 TeV 撞击数据中，研究 squarks 和 gluinos 的产生，排除了部分高质子质量范围。
Search for direct top squark pair production in final states with two leptons in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector
搜索的结果直接对生产的顶方在事件中有两个相反电荷的轻子（电子或μ子）的报告，使用36.1 FB $^{-1}$的综合光度从质子-质子碰撞在$\sqrt{s}=13$ TeV收集的ATLAS探测器在大型强子对撞机。为了涵盖顶夸克$\tilde{t}$和更轻的超对称粒子之间的质量差异范围，顶夸克的四种可能的衰变模式被专门选择为目标：$\tilde{t} \rightarrow b \tildeχ_{1}^{\pm}$衰变为$b$ -夸克和最轻的电荷伴与$\tildeχ_{1}^{\pm} \rightarrow W \tildeχ_{1}^{0}$，$\tilde{t} \rightarrow t \tildeχ_{1}^{0}$衰变为壳层顶夸克和最轻的中性伴，三体衰变$\tilde{t} \rightarrow b W \tildeχ_{1}^{0}$和四体衰变$\tilde{t} \rightarrow b \ell ν\tildeχ_{1}^{0}$。对于任何选择，在标准模型背景之上没有观察到显著过量的事件，并且将顶部方形的限制设置为$\tilde{t}$和$\tildeχ_{1}^{0}$质量的函数。结果排除在95%的置信水平$\tilde{t}$群众高达约720 GeV，扩展排除区域的超对称参数空间覆盖以前的搜索。
Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detector
Proceeding for LHCP2014 Poster: Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
本文报道了利用ATLAS探测器在LHC上记录的质子-质子碰撞数据的积分光度$20.1 \rm{fb}^{-1}$寻找顶夸克标量伙伴的直接对产生的结果。顶夸克被假定通过$\tilde{t} \rightarrow t \tildeχ_{1}^{0}$或$\tilde{t}\rightarrow b\tildeχ_{1}^{\pm} \rightarrow b W^{\left(\ast\right)} \tildeχ_{1}^{0}$衰变，其中$\tildeχ_{1}^{0}$（$\tildeχ_{1}^{\pm}$）表示超对称模型中最轻的中性伴子（电荷伴子）。搜索的目标是一个完全强子的最终状态的事件与四个或更多的喷流和大失踪的横向动量。没有显着超过标准模型的背景预测观察到，和排斥限制的顶部夸克和中性伴子的质量，并作为一个功能的分支分数的$\tilde{t} \rightarrow t \tildeχ_{1}^{0}$。对于100%的分支分数，对于低于30 GeV的$\tildeχ_{1}^{0}$质量，排除了270-645 GeV范围内的顶夸克质量。对于$\tilde{t} \rightarrow t \tildeχ_{1}^{0}$或$\tilde{t}\rightarrow b\tildeχ_{1}^{\pm}$的50%的支化分数，并且假设$\tildeχ_{1}^{\pm}$…
Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at $\sqrt{s}=8$ TeV Using the ATLAS Detector
Search for top squark pair production in a final state with at least one hadronically decaying tau lepton in proton-proton collisions at $\sqrt{s}$ = 13 TeV
