A search for narrow resonances at high mass in the dimuon and dielectron channels has been perfor... more 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 \( \sqrt {s} = 7 \) 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 (GKK) 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 1140GeV, the superstring-inspired Z ψ ′ below 887 GeV, and, for values of the coupling parameter \( {{k} \left/ {{{{\overline M }_{\text{Pl}}}}} \right.} \) of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.
s DESCRIPTION Fujitsu resonators C4 series (G type) feature originally developed single crystals ... more s DESCRIPTION Fujitsu resonators C4 series (G type) feature originally developed single crystals with a high electromechanical coefficient (LiNbO3 lithium niobate), the result is ultra compact packaging. C4 series (G type) with built-in capacitors for exclusive use in microcomputer clocks, and this series is chip type device for surface-mount.
A search for narrow resonances at high mass in the dimuon and dielectron channels has been perfor... more 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 \( \sqrt {s} = 7 \) 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 (GKK) 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 1140GeV, the superstring-inspired Z ψ ′ below 887 GeV, and, for values of the coupling parameter \( {{k} \left/ {{{{\overline M }_{\text{Pl}}}}} \right.} \) of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.
s DESCRIPTION Fujitsu resonators C4 series (G type) feature originally developed single crystals ... more s DESCRIPTION Fujitsu resonators C4 series (G type) feature originally developed single crystals with a high electromechanical coefficient (LiNbO3 lithium niobate), the result is ultra compact packaging. C4 series (G type) with built-in capacitors for exclusive use in microcomputer clocks, and this series is chip type device for surface-mount.
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