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在$\sqrt{s} =$ 13 TeV末态下有喷流和缺少横动量的质子-质子碰撞中寻找自然和分裂超对称性

Search for natural and split supersymmetry in proton-proton collisions at $\sqrt{s} =$ 13 TeV in final states with jets and missing transverse momentum

CMS Collaboration

备注：
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-16-038 (CMS Public Pages)
发表信息：
JHEP 05 (2018) 025
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摘要：

超对称性（SUSY）的搜索进行在最终状态，包括一个或多个射流和失踪的横向动量使用的数据，从质子-质子碰撞的质心能量为13 TeV。这些数据是2016年在CERN LHC用CMS探测器记录的，对应于35.9 fb $^{-1}$的积分亮度。发现信号事件的数量与标准模型过程的预期背景产量一致。结果被解释的背景下，假设生产的胶子或夸克对和他们的迅速衰变夸克和最轻的neutralino的超对称性简化模型。底部，顶部和质量简并轻味方的质量探测到1050，1000，和1325 GeV，分别。在1900、1650和1650 GeV的范围内，当胶子通过上述方子的虚态衰变时，胶子的质量被探测到。从胶子和夸克衰变的中性伴子的最强质量边界分别为1150和575 GeV。该搜索还提供了简化模型的灵敏度，该模型受到分裂超对称性的启发，涉及长寿命胶子的产生和衰变。适当的衰变长度$cτ$值从$10^{-3}$到$10^{5}$毫米被认为是，以及亚稳态的胶子的情况下。高达1750和900 GeV的Gluino质量探测$cτ=$ 1毫米和亚稳态，分别。灵敏度中度依赖于$cτ\gtrsim 1$ m的模型假设。搜索提供了覆盖的$cτ$参数空间的模型，涉及长寿命的胶子，是补充现有的技术在大型强子对撞机。

英文摘要：

A search for supersymmetry (SUSY) is performed in final states comprising one or more jets and missing transverse momentum using data from proton-proton collisions at a centre-of-mass energy of 13 TeV. The data were recorded with the CMS detector at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb$^{-1}$. The number of signal events is found to agree with the expected background yields from standard model processes. The results are interpreted in the context of simplified models of SUSY that assume the production of gluino or squark pairs and their prompt decay to quarks and the lightest neutralino. The masses of bottom, top, and mass-degenerate light-flavour squarks are probed up to 1050, 1000, and 1325 GeV, respectively. The gluino mass is probed up to 1900, 1650, and 1650 GeV when the gluino decays via virtual states of the aforementioned squarks. The strongest mass bounds on the neutralinos from gluino and squark decays are 1150 and 575 GeV, respectively. The search also provides sensitivity to simplified models inspired by split SUSY that involve the production and decay of long-lived gluinos. Values of the proper decay length $cτ$ from $10^{-3}$ to $10^{5}$ mm are considered, as well as a metastable gluino scenario. Gluino masses up to 1750 and 900 GeV are probed for $cτ=$ 1 mm and for the metastable state, respectively. The sensitivity is moderately dependent on model assumptions for $cτ\gtrsim 1$ m. The search provides coverage of the $cτ$ parameter space for models involving long-lived gluinos that is complementary to existing techniques at the LHC.

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