QQ客服 官方微博 反馈留言

	Search for standard model production of four top quarks in proton-proton collisions at root s=13tev
	Sirunyan, A. M.2; Tumasyan, A.2,3; Adam, W.3; Asilar, E.3; Bergauer, T.3; Brandstetter, J.3; Brondolin, E.3; Dragicevic, M.3; Eroe, J.3; Flechl, M.3
刊名	Physics letters b
	2017-09-10
卷号	772页码:336-358
关键词	Cms Physics Top Bsm
ISSN号	0370-2693
DOI	10.1016/j.physletb.2017.06.064
通讯作者	Sirunyan, a. m.()
英文摘要	A search for events containing four top quarks (t (t) over bart (t) over bar) is reported from proton-proton collisions recorded by the cms experiment at root s = 13 tev and corresponding to an integrated luminosity of 2.6 fb(-1). the analysis considers the single-lepton (e or mu)+jets and the opposite-sign dilepton (mu(+)mu(-),mu +/- e -/+ , or e(+) e(-))+ jets channels. it uses boosted decision trees to combine information on the global event and jet properties to distinguish between t (t) over bart (t) over bar and t (t) over bar production. the number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for t (t) over bart (t) over bar production in the standard model of 94 fb at 95% confidence level (10.2 x the prediction), with an expected limit of 118 fb. this is combined with the results from the published cms search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level (7.4xthe prediction), with an expected limit of 71 fb. these are the strongest constraints on the rate of t (t) over bart (t) over bar production to date. (c) 2017 the author(s). published by elsevier b.v.
WOS关键词	CROSS-SECTION
WOS研究方向	Astronomy & Astrophysics ; Physics
WOS类目	Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000411369700051
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177163
专题	高能物理研究所
通讯作者	Sirunyan, A. M.
作者单位	1.CERN, Geneva, Switzerland 2.Yerevan Phys Inst, Yerevan, Armenia 3.Inst Hochenergiephys, Vienna, Austria 4.Inst Nucl Problems, Minsk, Byelarus 5.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 6.Univ Antwerp, Antwerp, Belgium 7.Vrije Univ Brussel, Brussels, Belgium 8.Univ Libre Bruxelles, Brussels, Belgium 9.Univ Ghent, Ghent, Belgium 10.Catholic Univ Louvain, Louvain, Belgium
推荐引用方式 GB/T 7714	Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Search for standard model production of four top quarks in proton-proton collisions at root s=13tev[J]. Physics letters b,2017,772:336-358.
APA	Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,Bergauer, T..,...&Khan, W. A..(2017).Search for standard model production of four top quarks in proton-proton collisions at root s=13tev.Physics letters b,772,336-358.
MLA	Sirunyan, A. M.,et al."Search for standard model production of four top quarks in proton-proton collisions at root s=13tev".Physics letters b 772(2017):336-358.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

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。