119586383
Fast triggering with a plastic streamer tube calorimeter
Abstract We describe the use of the DELPHI Hadron Calorimeter, a plastic streamer tube detector, in conjunction with the DELPHI fast triggers. The essential parameters of this operation are the particle localization capability, affected by the charge diffusion on the graphite-coated cathode and the inherent noise of the streamer tubes. We present results of measurements of these features, performed on an installed calorimeter module, and give estimates of the fast trigger performance.
13355291
Novel Data Acquisition System for Silicon Tracking Detectors
We have developed a novel data acquisition system for measuring tracking parameters of a silicon detector in a particle beam. The system is based on a commercial Analog-to-Digital VME module and a PC Linux based Data Acquisition System. This DAQ is realized with C++ code using object-oriented techniques. Track parameters for the beam particles were reconstructed using off-line analysis code and automatic detector position alignment algorithm. The new DAQ was used to test novel Czochralski type silicon detectors. The important silicon detector parameters, including signal size distributions and signal to noise distributions, were successfully extracted from the detector under study. The efficiency of the detector was measured to be 95 %, the resolution about 10 µm, and the signal to noise ratio about 10.
120859704
Results on inclusive jets and jet properties
We report on a measurement of the inclusive jet cross section in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV using data collected by the D0 experiment at the Fermilab Tevatron Collider corresponding to an integrated luminosity of 0.70 fb{sup -1}. Detailed studies of correlations between systematic uncertainties in transverse momentum and rapidity are presented, and the cross section measurements are found to be in good agreement with next-to-leading order QCD calculations.
202114345
Probing QCD at high energy
potential sensitivity to new physics. The experimental systematics at the LHC are also becoming competitive with the Tevatron, making precision measurements of QCD possible. Measurements of inclusive jet, dijet and isolated prompt photon production can be used to test perturbative QCD predictions and to constrain parton distribution functions, as well as to measure the strong coupling constant. More exclusive topologies are used to constrain aspects of parton shower modeling, initial and final state radiation. Interest in boosted heavy resonances has resulted in novel studies of jet mass and subjet structure that also test perturbative QCD predictions and parton shower models. Studies of V+jets, including heavy flavor jets, constrain important backgrounds to single top, Higgs boson searches and new physics searches. At the highest mass scales, measurements of dijet mass and dijet angular distributions are sensitive probes of new physics.