Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2016 |
| 卷号 | 760页码:178 |
| 关键词 | CMS Physics Supersymmetry Leptons Low missing transverse energy |
| DOI | 10.1016/j.physletb.2016.06.039 |
| 英文摘要 | The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton-proton collisions at root s = 8 TeV, are presented. The search, which focuses on R-parity violating, chargino-mediated decays of the top squark, is performed in final states with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1)collected with the CMS detector at the LHC in 2012. The data are found to be in agreement with the standard model expectation, and upper limits are placed on the top squark pair production cross section at 95% confidence level. Assuming a 100% branching fraction for the top squark decay chain, (t) over tilde -> t (chi) over tilde (+/-)(1), (chi) over tilde (+/-)(1) -> l(+/-) + jj, top squark masses less than 890(1000) GeV for the electron (muon) channel are excluded for the first time in models with a single nonzero R-parity violating coupling. lambda'(ijk) (i, j, k <= 2), where i, j, k correspond to the three generations. (C) 2016 The Author(s). Published by Elsevier B.V. |
| 语种 | 英语 |
| WOS记录号 | WOS:000382890500029 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260740]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | CMS Collaboration. Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV[J]. PHYSICS LETTERS B,2016,760:178. |
| APA | CMS Collaboration.(2016).Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV.PHYSICS LETTERS B,760,178. |
| MLA | CMS Collaboration."Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV".PHYSICS LETTERS B 760(2016):178. |
入库方式： OAI收割
来源：高能物理研究所
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