Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector

	Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector
	ATLAS collaboration
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2014
期号	6
关键词	HADRON COLLIDERS SUPERGAUGE TRANSFORMATIONS PARTON DISTRIBUTIONS MEASURING MASSES SUPERSYMMETRY PARTICLE MODEL QUARK CURRENTS PIONS
通讯作者	Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
英文摘要	A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3 fb(-1) of pp collision data at root s = 8 TeV, collected by the ATLAS experiment at the Large Hadron Collider in 2012. No excess over the Standard Model expectation is found. The results are interpreted under the separate assumptions (i) that the top squark decays to a b-quark in addition to an on-shell chargino whose decay occurs via a real or virtual W boson, or (ii) that the top squark decays to a t-quark and the lightest neutralino. A top squark with a mass between 150 GeV and 445 GeV decaying to a b-quark and an on-shell chargino is excluded at 95% confidence level for a top squark mass equal to the chargino mass plus 10 GeV, in the case of a 1 GeV lightest neutralino. Top squarks with masses between 215 (90) GeV and 530 (170) GeV decaying to an on-shell (off-shell) t-quark and a neutralino are excluded at 95% confidence level for a 1 GeV neutralino.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000338346400001
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213732]
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. Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(6).
APA	ATLAS collaboration.(2014).Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(6).
MLA	ATLAS collaboration."Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .6(2014).