Performance of the CMS Global Calorimeter Trigger Brooke, J.; Foudas, C.; Frazier, R. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2010, Letnik:
623, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The CMS Global Calorimeter Trigger system performs a wide-variety of calorimeter data processing functions required by the CMS Level-1 trigger. It is responsible for finding and classifying jets and ...tau-jets, calculating total and missing transverse energy, total transverse energy identified within jets, sorting e/γ candidates, and calculating several quantities based on forward calorimetry for minimum-bias triggers. The system is based on high-speed serial optical links and large FPGAs. The system has provided CMS with calorimeter triggers during commissioning and cosmic runs throughout 2008. The performance of the system in validation tests and cosmic runs is presented here.
The CMS tracker readout front end driver Foudas, C.; Bainbridge, R.; Ballard, D. ...
IEEE transactions on nuclear science,
12/2005, Letnik:
52, Številka:
6
Journal Article
Recenzirano
Odprti dostop
The front end driver (FED), is a 9U 400 mm VME64x card designed for reading out the compact muon solenoid (CMS), silicon tracker signals transmitted by the APV25 analogue pipeline application ...specific integrated circuits. The FED receives the signals via 96 optical fibers at a total input rate of 3.4 GB/sec. The signals are digitized and processed by applying algorithms for pedestal and common mode noise subtraction. Algorithms that search for clusters of hits are used to further reduce the input rate. Only the cluster data along with trigger information of the event are transmitted to the CMS data acquisition system using the S-LINK64 protocol at a maximum rate of 400 MB/sec. All data processing algorithms on the FED are executed in large on-board field programmable gate arrays. Results on the design, performance, testing and quality control of the FED are presented and discussed
Neutrino tridents and W-Z interference MISHRA, S. R; RABINOWITZ, S. A; QUINTAS, P. Z ...
Physical review letters,
06/1991, Letnik:
66, Številka:
24
Journal Article
Recenzirano
We present a measurement of neutrino tridents, muon pairs induced by neutrino scattering in the Coulomb field of a target nucleus, in the Columbia-Chicago-Fermilab-Rochester neutrino experiment at ...the Fermilab Tevatron. The observed number of tridents after geometric and kinematic corrections, 37.0{plus minus}12.4, supports the standard-model prediction of 45.3{plus minus}2.3 events. This is the first demonstration of the {ital W}-{ital Z} destructive interference from neutrino tridents, and rules out, at 99% C.L., the {ital V}-{ital A} prediction without the interference.
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