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The cross sections and forward-backward asymmetries of hadronic and leptonic events produced in ee collisions at centre-of-mass energies from 130 to 183 GeV are presented. Results for ee, μμ, ττ, qq̄, bb̄ and cc̄ production show no significant deviation from the Standard Model predictions. This enables constraints to be set upon physics beyond the Standard(More)
As the largest EU Grid project, it is one of the Enabling Grids for E-SciencE initiatives foremost goals to establish a production quality Grid infrastructure. Amongst EGEE’s diverse duties the creation of a panEuropean Grid training organisation plays a prominent role. Close to the end of the first project phase, this paper describes the training(More)
Two German High Performace Computing (HPC) centers (SCC & HLRS), as well as the Center for Interdisciplinary Risk and Innovation Studies (ZIRIUS) of the University of Stuttgart have jointly created a program to relay knowledge about simulations to students at secondary schools. Through this program they want to narrow the gap between visibility and(More)
A sample of 3.6 million hadronic Z decays recorded between 1991 and 1995 with the ALEPH detector at LEP is used to investigate semileptonic decays of B mesons into nal states involving orbitally excited charm mesons. Topo-logical vertex criteria are used to search for decays involving narrow D states as well as wide D resonances and non-resonant D () nal(More)
Indirect limits on the mass of the lightest neutralino are derived from the results of searches for charginos, neutralinos, and sleptons performed with data taken by the ALEPH Collaboration at centre-of-mass energies near the Z peak and at 130 and 136 GeV. Within the context of the Minimal Supersymmetric Standard Model and whenMν̃ ≥ 200 GeV/c, the boundMχ >(More)
Simulierte Welten (engl. “Simulated Worlds”) relays HPC knowledge at secondary schools in the German state of Baden Wuerttemberg, through the collection, design and provision of related material, the documentation of successful teaching concepts, as well as direct interaction with teachers and scholars. The project was initiated by High Performance(More)
A search for Bs oscillations is performed using a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991–1995. Compared to previous inclusive lepton analyses, the proper time resolution and b-flavour mistag rate are significantly improved. Additional sensitivity to Bs mixing is obtained by identifying subsamples of events(More)
Searches for scalar top and bottom quarks have been performed with data collected by the ALEPH detector at LEP. The data sample consists of 21.7 pb taken at √ s = 161, 170, and 172 GeV and 5.7 pb taken at √ s = 130 and 136 GeV. No evidence for scalar top quarks or scalar bottom quarks was found in the channels t̃ → cχ, t̃ → blν̃, and b̃ → bχ. For the(More)