Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector
文献类型：期刊论文
| 作者 | ATLAS Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2018 |
| 卷号 | 78期号:1页码:18 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-017-5486-1 |
| 文献子类 | Article |
| 英文摘要 | A search for weakly interacting massive dark matter particles produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and missing transverse momentum are considered. The analysis uses 36.1 fb(-1) of proton proton collision data recorded by the ATLAS experiment at root s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are interpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour-neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross-section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements. |
| 电子版国际标准刊号 | 1434-6052 |
| WOS关键词 | HADRON COLLIDERS ; PARTON DISTRIBUTIONS ; MEASURING MASSES ; PAIR PRODUCTION ; CROSS-SECTION ; LHC ; CONSTRAINTS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000422660200005 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285536]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 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 | ATLAS Collaboration. Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(1):18. |
| APA | ATLAS Collaboration.(2018).Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,78(1),18. |
| MLA | ATLAS Collaboration."Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 78.1(2018):18. |
入库方式： OAI收割
来源：高能物理研究所
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