Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV

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	Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV
	CMS Collaboration
刊名	PHYSICS LETTERS B
	2013
卷号	722 期号:4--5 页码:273-294
关键词	MEDIATED SUPERSYMMETRY BREAKING DECAY
通讯作者	Alverson, G (reprint author), Northeastern Univ, Boston, MA 02115 USA.
英文摘要	Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 fb(-1) sample of proton-proton collisions at root s = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m > 220 GeV (for c tau < 500 mm), as well as on the proper decay length of the lightest neutralino, c tau > 6000 mm (for m < 150 GeV). (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000319638000005
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213540]
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 long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2013,722(4--5):273-294.
APA	CMS Collaboration.(2013).Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV.PHYSICS LETTERS B,722(4--5),273-294.
MLA	CMS Collaboration."Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV".PHYSICS LETTERS B 722.4--5(2013):273-294.