Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV
CMS Collaboration
刊名PHYSICAL REVIEW D
2015
卷号91期号:1页码:12007
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.012007
文章类型Article
英文摘要A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 fb(-1). No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5-200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2-40 cm, the upper limits on the cross section are typically 0.5-3 fb. The above limits are the most stringent on these channels to date.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000348329000001
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被引频次:22[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/311005/228134
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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CMS Collaboration. Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV[J]. PHYSICAL REVIEW D,2015,91(1):12007.
APA CMS Collaboration.(2015).Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV.PHYSICAL REVIEW D,91(1),12007.
MLA CMS Collaboration."Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV".PHYSICAL REVIEW D 91.1(2015):12007.
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