A search for anomalous production of events with three or more isolated leptons and bottom-quark jets produced in pp collisions at sqrt(s) = 8 TeV is presented. The analysis is based on a data sample corresponding to an integrated luminosity of 19.5 inverse femtobarns collected by the CMS experiment at the LHC in 2012. No excess above the standard model expectations is observed. The results are interpreted in the context of supersymmetric models with signatures that have low missing transverse energy arising from light top-squark pair production with R-parity-violating decays of the lightest supersymmetric particle. In two models with different R-parity-violating couplings, top-squarks are excluded below masses of 1020 GeV and 820 GeV when the lightest supersymmetric particle has a mass of 200 GeV.
Search for supersymmetry in events with $b$-tagged jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
寻找标准模型底夸克和顶夸克的超对称伙伴。搜索使用36.1 fb $^{-1}$的$pp$碰撞数据在$\sqrt{s}=13$ TeV收集的ATLAS实验在大型强子对撞机。直接生产对底部和顶部的squarks（$\tilde{b}_{1}$和$\tilde{t}_{1}$）搜索在最终状态与$b$标记的喷流和失踪的横向动量。不同的选择定义为在最终状态中没有带电轻子（电子或μ子），或者只有一个带电轻子。零轻子选择的目标模型中，$\tilde{b}_{1}$是最轻的夸克，并通过$\tilde{b}_{1} \rightarrow b \tildeχ^{0}_{1}$衰变，其中$\tildeχ^{0}_{1}$是最轻的中性伴子。单轻子末态的目标模型是产生底或顶方子，并可以衰变成多个通道，$\tilde{b}_{1} \rightarrow b \tildeχ^{0}_{1}$和$\tilde{b}_{1} \rightarrow t \tildeχ^{\pm}_{1}$，或$\tilde{t}_{1} \rightarrow t \tildeχ^{0}_{1}$和$\tilde{t}_{1} \rightarrow b \tildeχ^{\pm}_{1}$，其中$\tildeχ^{\pm}_{1}$是最轻的电荷子，质量差$m_{\tildeχ^{\pm}_{1}}- m_{\tildeχ^{…
Search for supersymmetry in hadronic final states with missing transverse energy using the variables AlphaT and b-quark multiplicity in pp collisions at 8 TeV
Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse momentum in proton-proton collisions at sqrt(s) = 8 TeV
结果从搜索超对称粒子的情况下，压缩质谱。数据样本对应于CMS实验在sqrt（s）= 8 TeV下记录的19.7个反飞秒质子-质子碰撞。搜索的目标是在W玻色子质量以下的质量差Δ m = m（顶夸克）- m（中性伴子）的情况下产生顶夸克对，并且在四体模式中顶夸克衰变（顶夸克到b l nu中性伴子），其中中性伴子被假定为最轻的超对称粒子（LSP）。这个特征包括一个与初态辐射有关的高横动量喷流，一个或两个低横动量轻子，以及显著的横动量缺失。在数据中观察到的事件产额与标准模型过程的预期背景贡献一致。限制上的截面上的顶夸克对生产的顶夸克和LSP质量的函数。假设四体衰变模式的分支分数为100%，则在95%CL时，Delta m = 25 GeV时排除了316 GeV以下的顶夸克质量。双轻子的数据也解释下的假设chargino中性伴随生产，随后衰变到slepton或sneutrinos。假设最轻的电荷伴子/次轻的中性伴子的质量与LSP的质量之差为20 GeV，并且是一个富含τ的衰变方案，则在95% CL下，m（电荷伴子）< 307 GeV的质量被排除在外。
Search for supersymmetry in events with at least one photon, missing transverse momentum, and large transverse event activity in proton-proton collisions at sqrt(s) = 13 TeV
Search for supersymmetry in final states with missing transverse momentum and charm-tagged jets using 139 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
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 supersymmetry in final states with two or three soft leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s} =$ 13 TeV
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 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
Search for supersymmetry in final states with missing transverse momentum and multiple $b$-jets in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
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 natural and split supersymmetry in proton-proton collisions at $\sqrt{s} =$ 13 TeV in final states with jets and missing transverse momentum
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…
Multi-channel search for squarks and gluinos in sqrt(s)=7 TeV pp collisions with the ATLAS detector
在由大型强子对撞机产生并由ATLAS探测器记录的4.7 fb-1的sqrt（s）=7 TeV pp碰撞中，寻找具有零、一和两个轻子的末态超对称粒子，以及确定为源自b夸克的喷流和不喷流。搜索使用一组变量携带的事件运动学的横向和平行的束线，是敏感的几个拓扑结构中预期的超对称性的信息。定义了互斥的最终状态，允许所有通道的组合以增加搜索灵敏度。未观察到与标准模型预期的偏离。提取了用于生产新颗粒的基准横截面上95%置信水平的上限。结果解释的上下文中的约束最小的超对称扩展到标准模型和超启发的模型与不同的，高多重性的最终状态。
Search for squarks and gluinos in final states with hadronically decaying $τ$-leptons, jets, and missing transverse momentum using $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
Search for squarks and gluinos in events with hadronically decaying tau leptons, jets and missing transverse momentum in proton-proton collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector
