Papers by Ernesto Linares
European Physical Journal C, 2011
The production of J/ψ mesons is studied in pp collisions at \(\sqrt{s} = 7\) TeV with the CMS ex... more The production of J/ψ mesons is studied in pp collisions at \(\sqrt{s} = 7\) TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb−1. The J/ψ differential cross section is determined, as a function of the J/ψ transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/ψ) component. Integrated over J/ψ transverse momentum from 6.5 to 30 GeV/c and over rapidity in the range |y|ψ mesons assuming unpolarized production and 26.0±1.4(stat.)±1.6(syst.)±2.9(luminosity) nb for J/ψ mesons from b-hadron decays.
Journal of High Energy Physics, 2011
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.
La automatización de procesos en la producción industrial, ha generado un gran avance, con la con... more La automatización de procesos en la producción industrial, ha generado un gran avance, con la consiguiente tecnificación que asume la productividad, lo cual implica una mayor competencia y una reducción en los costos de producción y precios.
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Papers by Ernesto Linares