447 research outputs found
The ATLAS liquid Argon calorimetry system
No full textThe status of construction and recent test beam results for the ATLAS liquid argon calorimetry system (electromagnetic, hadronic and forward calorimeters) are reported as well as a new development on the first-level trigger system for electromagnetic clusters and isolated hadrons
Commissioning of the ATLAS detector and combined beam test results
No full textThe ATLAS detector is a large and complex experiment. Commissioning of the various components, both separately and together, is a challenging task which requires a methodology and a sustained and detailed plan of work. The commissioning stages of ATLAS will be described, together with an overview of results obtained during the construction and the integration so far. Once installed and functional the various parts of the detectors are operated with cosmic particles in several combinations. The performance of the detector components, both individually and in combination, has been also measured in a series of test beam data taken over the last years
Measurement of and and upper limits on and
No full textUsing the data collected by ALEPH from 1991 to 1995 (3.6 hadronic Z decays) the inclusive branching ratios b->tau nu X and b-> tau nu D*+(X) are measured and agree with the SM prediction. An upper limit on the exclusive branching ratio B- -> tau nu is set and a first limit is placed conservatively on b->nu nubar s. All these measurements are performed using the missing energy spectrum in Z hadronic decays hemispheres. A complementary measurement of the inclusive channel b->tau nu X is also performed using the kinematic characteristics of hadronic jets containing two opposite sign leptons. These measurements allow to put an upper limit on tan(beta)/M_H+- in the frame of any type II two Higgs doublets model
Study of the Liquid-Argon Calorimeter of the H1 Experiment at HERA: Fast Simulation of Showers Initiated by Hadrons in a Calorimeter and Study of Weighting Methods for the Measure ment of Initial Hadron Energy
No full text
Material between the presampler and the EMB module 0
No full textThis note presents an evaluation of the amount of material located between the presampler and the lAr electromagnetic barrel module 0. After a study concerning the level of accuracy to which the material has to be described, the amount of material due to the mother boards and the cables is evaluated. The hardware used in the barrel module 0 in august 2000 test beam is in principle similar to the final setup. So the present computation should hold for the final calorimeter
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