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Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector
ATLAS collaboration
2014
发表期刊PHYSICAL REVIEW D
卷号90期号:11
通讯作者Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
摘要A search has been performed, using the full 20.3 fb(-1) data sample of 8 TeV proton-proton collisions collected in 2012 with the ATLAS detector at the LHC, for photons originating from a displaced vertex due to the decay of a neutral long-lived particle into a photon and an invisible particle. The analysis investigates the diphoton plus missing transverse momentum final state, and is therefore most sensitive to pair production of long-lived particles. The analysis technique exploits the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction, as well as the time of flight, of photons. No excess is observed over the Standard Model predictions for background. Exclusion limits are set within the context of gauge mediated supersymmetry breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying into a photon and gravitino with a lifetime in the range from 250 ps to about 100 ns.
关键词DYNAMICAL SUPERSYMMETRY BREAKING SUPERGAUGE TRANSFORMATIONS HIGGS-BOSON MODEL PARTICLE ENERGY GENERATORS EXTENSION CURRENTS PHYSICS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.90.112005
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000346096000001
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被引频次:21[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/311005/213831
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 nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector[J]. PHYSICAL REVIEW D,2014,90(11).
APA ATLAS collaboration.(2014).Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector.PHYSICAL REVIEW D,90(11).
MLA ATLAS collaboration."Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector".PHYSICAL REVIEW D 90.11(2014).
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