A search for $R$-parity violating supersymmetric decays of the top squark to a $b$-jet and a lepton in $\sqrt{s}$ = 13 TeV $pp$ collisions with the ATLAS detector
A search is presented for direct pair production of the stop, the supersymmetric partner of the top quark, in a decay through an $R$-parity violating coupling to a charged lepton and a $b$-quark. The dataset corresponds to an integrated luminosity of 140 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of $\sqrt{s}$ = 13 TeV collected between 2015 and 2018 by the ATLAS detector at the LHC. The final state has two charged leptons (electrons or muons) and two $b$-jets. The results of the search are interpreted in the context of a Minimal Supersymmetric Standard Model with an additional $B-L$ gauge symmetry that is spontaneously broken. No significant excess is observed over the Standard Model background and exclusion limits on stop pair production are set at 95% confidence level. The corresponding lower limits on the stop mass for 100% branching ratios to a $b$-quark and an electron, muon, or tau-lepton are 1.9 TeV, 1.8 TeV and 800 GeV, respectively, extending the reach of previous LHC searches.
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 top and bottom squarks from gluino pair production in final states with missing transverse energy and at least three b-jets with the ATLAS detector
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 with the ATLAS detector in final states with jets and missing transverse momentum using $\sqrt{s}=8$ TeV proton--proton collision data
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 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 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。
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 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
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 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。
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$\tildeχ_{1}^{\pm}$…
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
Search for direct top squark pair production in events with a Higgs or $Z$ boson, and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
搜索直接顶夸克对生产的事件，无论是相同的味道相反的符号双轻子对不变的质量兼容的$Z$玻色子或一对喷流兼容的标准模型（SM）希格斯玻色子（$h$）。要求额外的轻子，喷流，喷流确定为源自$b$ -夸克，和失踪的横向动量施加目标的其他衰变产物的顶夸克对。该分析使用2015- 2016年在LHC使用ATLAS探测器收集的$\sqrt{s}=13$ TeV的质子-质子碰撞数据进行，对应于36.1 fb $^{-1}$的积分光度。在数据中没有观察到超过SM预测。结果被解释在两套模型。在第一组中，直接生产的对较轻的顶方（$\tilde{t}_1$）与长衰变链涉及$Z$或希格斯玻色子被认为是。第二组包括通过$\tilde{t}_2 \rightarrow Z \tilde{t}_1 $或$\tilde{t}_2 \rightarrow h \tilde{t}_1$衰减的较重的顶夸克对（$\tilde{t}_2$）的直接对产生。结果排除在95%的置信水平$\tilde{t}_2$和$\tilde{t}_1$质量高达约800 GeV，扩大了以前的LHC搜索覆盖的超对称参数空间的排除区域。
Search for pair production of squarks or gluinos decaying via sleptons or weak bosons in final states with two same-sign or three leptons with the ATLAS detector
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探测器记录的$\sqrt{s}=8$ TeV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…
Search for bottom-squark pair production in $pp$ collision events at $\sqrt{s} = 13$ TeV with hadronically decaying $τ$-leptons, $b$-jets and missing transverse momentum using the ATLAS detector
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））
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。
在最小超对称标准模型（MSSM）中，研究了夸克世代混合对夸克和胶子产生和衰变的影响，重点研究了第二代和第三代夸克的混合.考虑到从B-物理实验的限制，我们表明，在参数空间中存在的各种区域的夸克和/或胶子衰变到夸克味违反（QFV）的最终状态可以有大的分支比。这里我们考虑正方体的费米子衰变和玻色子衰变。相应的QFV信号的速率，例如pp -> t t bar{c} bar{c} missing-E_T X，在LHC（14 TeV）处可以是显著的。我们发现，列入味混合效应可以是重要的搜索的方和胶子和确定的MSSM在LHC的基本模型参数。
A search for top-squark pair production, in final states containing a top quark, a charm quark and missing transverse momentum, using the 139 fb$^{-1}$ of $pp$ collision data collected by the ATLAS detector
Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Search for a scalar partner of the top quark in the all-hadronic $t\bar{t}$ plus missing transverse momentum final state at $\sqrt{s}=13$ TeV 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。
