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Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at root s=7 TeV
CMS Collaboration
2012
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号11
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon in gauge-mediated supersymmetry, with the neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest. The search uses events containing photons, missing transverse energy, and jets. The impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons. The method is sensitive to lifetimes of the order of 0.1 to ins. The data sample corresponds to an integrated luminosity of 2.23 fb(-1) in pp collisions at root s = 7 TeV, recorded in the first part of 2011 by the CMS experiment at the LHC. Cross-section limits are presented on pair production for such particles, each of which decays into a photon and invisible particles. The observed 95% confidence level limits vary between 0.11 and 0.21 pb, depending on the neutral particle lifetime.
关键词MEDIATED SUPERSYMMETRY BREAKING COLLIDERS
学科领域Physics
DOI10.1007/JHEP11(2012)172
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000312484500041
引用统计
被引频次:3[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/311005/213405
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at root s=7 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(11).
APA CMS Collaboration.(2012).Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at root s=7 TeV.JOURNAL OF HIGH ENERGY PHYSICS(11).
MLA CMS Collaboration."Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at root s=7 TeV".JOURNAL OF HIGH ENERGY PHYSICS .11(2012).
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