Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at root s=8 TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2014 |
| 卷号 | 736页码:371-397 |
| 关键词 | SUPERSYMMETRIC THEORIES ATLAS DETECTOR FINAL-STATES B-JETS NATURALNESS BREAKING MODELS MASS LHC |
| 通讯作者 | Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia. |
| 英文摘要 | A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton-proton collisions at root s = 8 TeVcollected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5 fb(-1). The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate (t) over tilde (2) decaying to a lighter top-squark mass eigenstate (t) over tilde (1) via either (t) over tilde (2) -> H (t) over tilde (1) or (t) over tilde (2) -> Z (t) over tilde (1), followed in both cases by (t) over tilde (1) -> t (chi) over tilde (0)(1), where (chi) over tilde (0)(1) is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the (t) over tilde (1) and (chi) over tilde (0)(1) states is approximately equal to the top-quark mass (m((t) over tilde )1) - m((chi) over tilde 10) similar or equal to m(t)) which is not probed by searches for direct (t) over tilde (1) squark pair production. The analysis excludes top squarks with masses m((t) over tilde2) < 575 GeVand m(<(t)over tilde>1) < 400 GeVat a 95% confidence level. (C) 2014 The Authors. Published by Elsevier B.V. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000341487800057 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213773]  |
| 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 top-squark pairs decaying into Higgs or Z bosons in pp collisions at root s=8 TeV[J]. PHYSICS LETTERS B,2014,736:371-397. |
| APA | CMS Collaboration.(2014).Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at root s=8 TeV.PHYSICS LETTERS B,736,371-397. |
| MLA | CMS Collaboration."Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at root s=8 TeV".PHYSICS LETTERS B 736(2014):371-397. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。