Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector

doi:10.1140/epjc/s10052-017-5081-5

	Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector
	ATLAS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2017
卷号	77 期号:9 页码:580
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-017-5081-5
文献子类	Article
英文摘要	The rejection of forward jets originating from additional proton-proton interactions (pile-up) is crucial for a variety of physics analyses at the LHC, including Standard Model measurements and searches for physics beyond the Standard Model. The identification of such jets is challenging due to the lack of track and vertex information in the pseudorapidity range vertical bar eta vertical bar > 2.5. This paper presents a novel strategy for forward pile-up jet tagging that exploits jet shapes and topological jet correlations in pile-up interactions. Measurements of the per-jet tagging efficiency are presented using a data set of 3.2 fb(-1) of proton-proton collisions at a centre-of-mass energy of 13 TeV collected with the ATLAS detector. The fraction of pile-up jets rejected in the range 2.5 < vertical bar eta vertical bar < 4.5 is estimated in simulated events with an average of 22 interactions per bunch-crossing. It increases with jet transverse momentum and, for jets with transverse momentum between 20 and 50 GeV, it ranges between 49% and 67% with an efficiency of 85% for selecting hard-scatter jets. A case study is performed in Higgs boson production via the vector-boson fusion process, showing that these techniques mitigate the background growth due to additional proton-proton interactions, thus enhancing the reach for such signatures.
电子版国际标准刊号	1434-6052
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000409355300002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284550]
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. Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2017,77(9):580.
APA	ATLAS Collaboration.(2017).Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,77(9),580.
MLA	ATLAS Collaboration."Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 77.9(2017):580.