论文标题
使用Dilepton最终状态在$ \ sqrt {s} = $ 13 TEV中搜索最佳爆炸对生产。
Search for top squark pair production using dilepton final states in pp collision data collected at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
在最终状态下，搜索了顶部夸克（Top quarks）的超对称伴侣，其中有两个相对充满电的瘦素（电子或穆斯），喷气机被确定为源自B夸克，而缺失的横向动量。该搜索使用$ \ sqrt {s} = $ 13用CMS检测器收集的proton-proton碰撞的数据，对应于137 fb $^{ - 1} $的集成光度。假设的信号事件有效地与主要的顶部夸克对生产背景分开，对缺失的横向动量和横向质量变量的重要性有要求。与预期的背景没有明显的偏差。排除限制是在简化的超对称模型的背景下设置的，具有成对的最轻的顶部蹲。对于仅在顶部夸克和最轻的中性诺的顶级蹲下，下限的置信度分别为95％的置信水平，在顶部squark的质量和中性诺中的质量水平分别为925和450 GEV。如果衰减通过中间chargino进行，则最轻的顶部挤压质量上的相应下限将设置为420 GEV以下的中性肿块的850 GEV。对于通过Charginos和Slectons经历级联腐烂的顶级蹲下，对于顶部蹲下和最轻的Neutmorino，质量限制分别达到1.4 TEV和900 GEV。
A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum. The search uses data from proton-proton collisions at $\sqrt{s} =$ 13 TeV collected with the CMS detector, corresponding to an integrated luminosity of 137 fb$^{-1}$. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95% confidence level on the masses of the top squark and the neutralino up to 925 and 450 GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850 GeV for neutralino masses below 420 GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4 TeV and 900 GeV respectively for the top squark and the lightest neutralino.
