5 Matching Results

Search Results

Advanced search parameters have been applied.

A time-of-flight detector for CDF

Description: A Time-of-Flight detector (TOF), with a technique based on plastic scintillators and fine-mesh photomultipliers, has been added to the CDF-II experiment. The main physics motivation is to improve neutral B meson flavor determination by K{sup {+-}} identification. The expected time resolution is 100 ps, which provides at least two standard deviations separation between K{sup {+-}} and {pi}{sup {+-}} for momenta p < 1.6 GeV/c and better than 1.2 standard deviations separation over all momenta when combining TOF identification with dE/dx identification using the new drift chamber.
Date: March 2, 2001
Creator: Vila, I.
Partner: UNT Libraries Government Documents Department

Performance and first physics results of the SVT trigger at CDF II

Description: For the first time in a hadron collider, a novel trigger processor, the Silicon Vertex Trigger (SVT), allows to select the long-lived heavy flavor particles by cutting on the track impact parameter with a precision similar to that of the offline reconstruction. Triggering on displaced tracks has enriched the B-physics program by enhancing the B yields of the lepton-based triggers and opened up full hadronic triggering at CDF. After a first commissioning period, the SVT is fully operational, performing very closely to its design capabilities. System performance and first physics results based on SVT selected data samples are presented.
Date: December 3, 2003
Creator: Vila, I.
Partner: UNT Libraries Government Documents Department

Exotic Physics: Search for New Physics Leading to High Mass Tau Pairs With ppbar Collisions at 1.96 TeV Using Cdf Ii

Description: Abstract: We present the results of a search for anomalous resonant production of tau lepton pairs with large invariant mass, the first such search using the CDF II Detector in Run II of the Tevatron p{bar p} collider. Such anomalous production could arise from various new physics processes. In a data sample corresponding to 195 pb{sup -1} of integrated luminosity we predict 2.8 {+-} 0.5 events from Standard Model background processes and observe 4. We use this result to set limits on the production of heavy scalar and vector particles decaying to tau lepton pairs.
Date: June 15, 2005
Creator: Academia Sinica Institute of Physics
Partner: UNT Libraries Government Documents Department