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首页> 外文期刊>Physics Letters, B. Nuclear Physics and High Energy Physics >Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at root s=13 TeV
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Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at root s=13 TeV

机译:在具有两个柔软的相反电荷的Leptons和Root S = 13 Tev的质子 - 质子碰撞中缺少横向动量的事件中搜索新物理学

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摘要

A search is presented for new physics in events with two low-momentum, oppositely charged leptons (electrons or muons) and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of 13TeV. The data collected using the CMS detector at the LHC correspond to an integrated luminosity of 35.9 fb(-1). The observed event yields are consistent with the expectations from the standard model. The results are interpreted in terms of pair production of charginos and neutralinos ((chi) over tilde (+/-)(1) and (chi) over tilde (0)(2)) with nearly degenerate masses, as expected in natural supersymmetry models with light higgsinos, as well as in terms of the pair production of top squarks ((t) over tilde), when the lightest neutralino and the top squark have similar masses. At 95% confidence level, wino-like (chi) over tilde (+/-)(1)/(chi) over tilde (0)(2) masses are excluded up to 230GeVfor a mass difference of 20GeV relative to the lightest neutralino. In the higgsino-like model, masses are excluded up to 168GeV for the same mass difference. For (t) over tilde pair production, top squark masses up to 450GeVare excluded for a mass difference of 40GeV relative to the lightest neutralino. (C) 2018 The Author(s). Published by Elsevier B.V.
机译:在具有两个低动度的事件中为新物理学提供了一种搜索,在13Tev的质量中心能量的质子 - 质子碰撞中缺少横向动量的事件。使用LHC处的CMS检测器收集的数据对应于35.9FB(-1)的集成光度。观察到的事件产量与标准模型的期望一致。结果是在夏尔尼和中性的一对Quale(+/-)(1)(1)(1)和(2)上)的基础(ZIL)和(2)),与自然超比的预期相比当最轻中性的中性和顶缝有类似的质量时,具有轻质HIGGSINOS的模型,以及TINDE上的顶部尖叫((t))的生产。在95%的置信水平上,在波浪(0)(2)(2)块块上的折叠薄板(+/-)(1)/(Chi)被排除在高达230GeV,对于相对于最轻的中性初级的质量差异为20GeV 。在HIGGSINO的模型中,群众被排除在最多168GeV中,以获得相同的质量差异。对于(t)在波尔德对生产上,顶缝肿块高达450GeVare,不包括相对于最轻中性的40GeV的质量差异。 (c)2018年作者。由elsevier b.v出版。

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