首页> 外文期刊>Physics Letters, B. Nuclear Physics and High Energy Physics >Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV
【24h】

Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV

机译:在根s = 8 TeV的质子-质子碰撞中具有轻子,低射流多样性和横向能量缺失的事件中寻找超对称性

获取原文
获取原文并翻译 | 示例
           

摘要

Results are presented from a search for super symmetric particles in scenarios with small mass splittings. The data sample corresponds to 19.7 fb(-1) of proton-proton collisions recorded by the CMS experiment at root s = 8 TeV. The search targets top squark ((t) over tilde) pair production in scenarios with mass differences Delta m = m((t) over tilde) - m((chi) over tilde (0)(1)) below the W-boson mass and with top-squark decays in the four-body mode ((t) over tilde -> bl nu(chi) over tilde (0)(1)), where the neutralino ((chi) over tilde (0)(1)) is assumed to be the lightest supersymmetric particle (LSP). The signature includes a high transverse momentum (p(T)) jet associated with initial-state radiation, one or two low-p(T) leptons, and significant missing transverse energy. The event yields observed in data are consistent with the expected background contributions from standard model processes. Limits are set on the cross section for top squark pair production as a function of the (t) over tilde t and LSP masses. Assuming a 100% branching fraction for the four-body decay mode, top-squark masses below 316 GeV are excluded for Delta m = 25 GeV at 95% CL. The dilepton data are also interpreted under the assumption of chargino-neutralino production, with subsequent decays to sleptons or sneutrinos. Assuming a difference between the common ($) over tilde (+)(1)/(chi) over tilde (0)(2) mass and the LSP mass of 20 GeV and a tau-enriched decay scenario, masses in the range m((chi) over tilde (+)(1)) < 307 GeV are excluded at 95% CL. (C) 2016 The Author. Published by Elsevier B.V.
机译:结果是通过在小质量分裂情况下搜索超对称粒子给出的。数据样本对应于CMS实验在根s = 8 TeV处记录的19.7 fb(-1)质子-质子碰撞。搜索的目标是在W玻色子以下的质量差异Delta m = m((t)上的tild)-m((chi)上的代字号(0)(1))的情况下,对顶级夸克(t)质量和具有顶方的衰减在四体模式下衰减(在波浪号上的(t)->在波浪号(0)(1)上的bl nu(chi)),其中中性点((chi)在波浪号(0)(1)上))被认为是最轻的超对称粒子(LSP)。信号包括与初始状态辐射相关的高横向动量(p(T))射流,一个或两个低p(T)轻子以及明显的横向能量缺失。数据中观察到的事件产生与标准模型过程的预期背景贡献一致。根据波浪号t和LSP质量(t)的函数,在顶部壁对副的横截面上设置极限。假设四体衰减模式的分支分数为100%,则对于Delta m = 25 GeV(在95%CL时),排除了316 GeV以下的上层质量。假想中性中子产生的假说也解释了双链蛋白的数据,随后衰减为瘦子或中微子。假设公共($)对波浪号(+)(1)/(chi)对波浪线(0)(2)的质量与20 GeV的LSP质量以及tau富集的衰减情况之间的差异,质量在m范围内(307)小于307 GeV的((chi)超过代字号(+)(1))在95%CL处被排除。 (C)2016作者。由Elsevier B.V.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号