Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \varvec{\sqrt{s} = 8} TeV using the ATLAS experiment

	Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \varvec{\sqrt{s} = 8} TeV using the ATLAS experiment
	ATLAS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2015
卷号	75 期号:9 页码:407
英文摘要	Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should bemoving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb(-1) of pp collisions at root s = 8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 % confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000363330800007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/229018]
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 metastable heavy charged particles with large ionisation energy loss in pp collisions at \varvec{\sqrt{s} = 8} TeV using the ATLAS experiment[J]. EUROPEAN PHYSICAL JOURNAL C,2015,75(9):407.
APA	ATLAS Collaboration.(2015).Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \varvec{\sqrt{s} = 8} TeV using the ATLAS experiment.EUROPEAN PHYSICAL JOURNAL C,75(9),407.
MLA	ATLAS Collaboration."Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \varvec{\sqrt{s} = 8} TeV using the ATLAS experiment".EUROPEAN PHYSICAL JOURNAL C 75.9(2015):407.