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Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at root s=7 TeV with the ATLAS detector
ATLAS collaboration
2013
发表期刊PHYSICS LETTERS B
卷号719期号:4--5页码:280-298
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. In this Letter, results are presented of a search for events containing one or more such particles, which decay at a significant distance from their production point, using a final state containing charged hadrons and an associated muon. This analysis uses a data sample of proton-proton collisions at root s = 7 TeV corresponding to an integrated luminosity of 4.4 fb(-1) collected in 2011 by the ATLAS detector operating at the Large Hadron Collider. Results are interpreted in the context of R-parity violating supersymmetric scenarios. No events in the signal region are observed and limits are set on the production cross section for pair production of supersymmetric particles, multiplied by the square of the branching fraction for a neutralino to decay to charged hadrons and a muon, based on the scenario where both of the produced supersymmetric particles give rise to neutralinos that decay in this way. However, since the search strategy is based on triggering on and reconstructing the decay products of individual long-lived particles, irrespective of the rest of the event, these limits can easily be reinterpreted in scenarios with different numbers of long-lived particles per event. The limits are presented as a function of neutralino lifetime, and for a range of squark and neutralino masses. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
关键词SUPERSYMMETRY BREAKING PARTON DISTRIBUTIONS LOCAL SUPERSYMMETRY GRAND UNIFICATION LHC COLLIDERS MODELS HIGGS BOSON MASS
学科领域Physics
DOI10.1016/j.physletb.2013.01.042
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000315316900007
引用统计
被引频次:42[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213469
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at root s=7 TeV with the ATLAS detector[J]. PHYSICS LETTERS B,2013,719(4--5):280-298.
APA ATLAS collaboration.(2013).Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at root s=7 TeV with the ATLAS detector.PHYSICS LETTERS B,719(4--5),280-298.
MLA ATLAS collaboration."Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at root s=7 TeV with the ATLAS detector".PHYSICS LETTERS B 719.4--5(2013):280-298.
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