13865686
CP Violation in Cascade Decays of B Mesons
General techniques are introduced to expose new CP-nonconserving effects in cascade decays of B mesons. These effects are computed in the Kobayashi-Maskawa model. The CP asymmetries so obtained range from 2% to 20% if the parameters are in the favorable range s/sub 3/
121068358
Production of prompt muons in the forward direction by 400-GeV proton interactions
The ratio of prompt negative muons to negative pions produced in the forward direction by the interaction of 400-GeV protons on copper has been determined to be 5.8times10$sup -5$ for 55-GeV muons, 3.05times10$sup -5$ for 102- GeV muons, and 1.93times10$sup -5$ for 230-GeV muons. The ratio of prompt positive muons to negative muons was about 1. (AIP)
126117538
Polarization of Prompt Muons
The polarization of 185-GeV prompt muons produced in the forward direction by the interaction of 400-GeV protons has been measured to be P=0.00 +- 0.10 along their direction of flight. The null value for the polarization suggests that the muons are produced through electromagnetic interactions. (AIP)
120133715
Comparison of signals obtained from oxygenated and non-oxygenated silicon microstrip detectors after irradiation to 3×1014 p cm−2
Abstract Full size silicon microstrip detectors have been prototyped for the LHC and fabricated on both oxygenated and non-oxygenated substrate material. The detectors were irradiated with protons to 3×10 14 p cm −2 and their signals compared as a function of bias voltage after short-term and long-term annealing.
110213019
A fast track trigger processor for the opal detector at LEP
Abstract A fast hardware track trigger processor being built for the OPAL experiment is described. The processor will analyse data from the central drift chambers of OPAL to determine whether any tracks come from the interaction region, and thereby eliminate background events. The processor will find tracks over a large angular range, |cos θ | ≲ 0.95. The design of the processor is described, together with a brief account of its hardware implementation for OPAL. The results of feasibility studies are also presented.
109583813
Application of advanced thermal management technologies to the ATLAS SCT barrel module baseboards
Abstract The paper describes the application of advanced thermal management technologies to the design and production of the barrel module baseboard of the SemiConductor Tracker (SCT) of the ATLAS experiment at the Large Hadron Collider (LHC). The barrel modules contain silicon microstrip sensors and readout ASICs for tracking charged particles, and the baseboard forms the central element of the module, providing both its necessary thermal management and its mechanical structure. The baseboard requirements and specifications are given, and design and fabrication details are described. The properties of the 3000 baseboards successfully produced for the SCT are summarised.