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Search for resonances in the dilepton mass distribution in pp collisions at root s=7 TeV
CMS Collaboration
2011
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号5
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A search for narrow resonances at high mass in the dimuon and dielectron channels has been performed by the CMS experiment at the CERN LHC, using pp collision data recorded at root s = 7 TeV. The event samples correspond to integrated luminosities of 40 pb(-1) in the dimuon channel and 35 pb(-1) in the dielectron channel. Heavy dilepton resonances are predicted in theoretical models with extra gauge bosons (Z') or as Kaluza-Klein graviton excitations (G(KK)) in the Randall-Sundrum model. Upper limits on the inclusive cross section of Z'(GKK) -> l + l(-) relative to Z -> l + l(-) are presented. These limits exclude at 95% confidence level a Z' with standard-model-like couplings below 1140 GeV, the superstring-inspired Z'(psi) below 887 GeV, and, for values of the coupling parameter k/(M) over bar (Pl) of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.
关键词FERMION-PAIR PRODUCTION E(+)E(-) COLLISIONS STANDARD MODEL LEP CONSTRAINTS PHYSICS HADRON
学科领域Physics
DOI10.1007/JHEP05(2011)093
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000291364500025
引用统计
被引频次:35[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/311005/213057
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 resonances in the dilepton mass distribution in pp collisions at root s=7 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(5).
APA CMS Collaboration.(2011).Search for resonances in the dilepton mass distribution in pp collisions at root s=7 TeV.JOURNAL OF HIGH ENERGY PHYSICS(5).
MLA CMS Collaboration."Search for resonances in the dilepton mass distribution in pp collisions at root s=7 TeV".JOURNAL OF HIGH ENERGY PHYSICS .5(2011).
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