Search for vectorlike light-flavor quark partners in proton-proton collisions at root s=8 TeV
文献类型：期刊论文
| 作者 | CMS Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2018 |
| 卷号 | 97期号:7页码:72008 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.97.072008 |
| 文献子类 | Article |
| 英文摘要 | A search is presented for heavy vectorlike quarks (VLQs) that couple only to light quarks in proton-proton collisions at root s = 8 TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb(-1). Both single and pair production of VLQs are considered. The single-production search is performed for down-type VLQs (electric charge of magnitude 1/3), while the pair-production search is sensitive to up-type (charge of magnitude 2/3) and down-type VLQs. Final states with at least one muon or one electron are considered. No significant excess over standard model expectations is observed, and lower limits on the mass of VLQs are derived. The lower limits range from 400 to 1800 GeV, depending on the single-production cross section and the VLQ branching fractions B to W, Z, and Higgs bosons. When considering pair production alone, VLQs with masses below 845 GeV are excluded for B(W) = 1.0, and below 685 GeV for B(W) = 0.5, B(Z) = B(H) = 0.25. The results are more stringent than those previously obtained for single and pair production of VLQs coupled to light quarks. |
| 电子版国际标准刊号 | 2470-0029 |
| WOS关键词 | HIGGS |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000429636500001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285821]  |
| 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 vectorlike light-flavor quark partners in proton-proton collisions at root s=8 TeV[J]. PHYSICAL REVIEW D,2018,97(7):72008. |
| APA | CMS Collaboration.(2018).Search for vectorlike light-flavor quark partners in proton-proton collisions at root s=8 TeV.PHYSICAL REVIEW D,97(7),72008. |
| MLA | CMS Collaboration."Search for vectorlike light-flavor quark partners in proton-proton collisions at root s=8 TeV".PHYSICAL REVIEW D 97.7(2018):72008. |
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。