Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector

	Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector
	ATLAS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2015
卷号	75 期号:2 页码:92
英文摘要	This article reports on a search for dark matter pair production in association with bottom or top quarks in 20.3 fb(-1) of pp collisions collected at root s = 8 TeV by the ATLAS detector at the LHC. Events with large missing transverse momentum are selected when produced in association with high-momentum jets of which one or more are identified as jets containing b-quarks. Final states with top quarks are selected by requiring a high jet multiplicity and in some cases a single lepton. The data are found to be consistent with the Standard Model expectations and limits are set on the mass scale of effective field theories that describe scalar and tensor interactions between dark matter and Standard Model particles. Limits on the dark-matter-nucleon cross-section for spin-independent and spin-dependent interactions are also provided. These limits are particularly strong for low-mass dark matter. Using a simplified model, constraints are set on the mass of dark matter and of a coloured mediator suitable to explain a possible signal of annihilating dark matter.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000354546000007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228511]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	ATLAS Collaboration. Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2015,75(2):92.
APA	ATLAS Collaboration.(2015).Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,75(2),92.
MLA	ATLAS Collaboration."Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 75.2(2015):92.