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Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS
ATLAS collaboration
2014
发表期刊PHYSICAL REVIEW LETTERS
卷号112期号:20
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in 4.5 fb(-1) (20.3 fb(-1)) of 7 (8) TeV pp collision data collected by the ATLAS experiment. Assuming the standard model rate for ZH production, an upper limit of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson at a mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit on the allowed dark matter-nucleon scattering cross section within a Higgs-portal dark matter scenario. Within the constraints of such a scenario, the results presented in this Letter provide the strongest available limits for low-mass dark matter candidates. Limits are also set on an additional neutral Higgs boson, in the mass range 110 < m(H) < 400 GeV, produced in association with a Z boson and decaying to invisible particles.
关键词DARK-MATTER MAJORON MODELS LEPTON NUMBER PARTICLES VIOLATION DETECTOR MASSES LHC
学科领域Physics
DOI10.1103/PhysRevLett.112.201802
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000339554800003
引用统计
被引频次:114[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/311005/213745
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 Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS[J]. PHYSICAL REVIEW LETTERS,2014,112(20).
APA ATLAS collaboration.(2014).Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS.PHYSICAL REVIEW LETTERS,112(20).
MLA ATLAS collaboration."Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS".PHYSICAL REVIEW LETTERS 112.20(2014).
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