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Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV
CMS Collaboration
2016
发表期刊PHYSICS LETTERS B
卷号759页码:9-35
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.
文章类型Article
关键词CMS Physics Supersymmetry
DOI10.1016/j.physletb.2016.05.033
关键词[WOS]PARTON DISTRIBUTIONS ; HADRON COLLIDERS ; LHC ; BREAKING ; PHYSICS ; MODELS ; SQUARK
语种英语
WOS记录号WOS:000380409200002
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260729
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV[J]. PHYSICS LETTERS B,2016,759:9-35.
APA CMS Collaboration.(2016).Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV.PHYSICS LETTERS B,759,9-35.
MLA CMS Collaboration."Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV".PHYSICS LETTERS B 759(2016):9-35.
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