64455357
Normalization in DELPHI
109609645
Chelonia : A self-healing, replicated storage system
Chelonia is a novel grid storage system designed to fill the requirements gap between those of large, sophisticated scientific collaborations which have adopted the grid paradigm for their distributed storage needs, and of corporate business communities gravitating towards the cloud paradigm. Chelonia is an integrated system of heterogeneous, geographically dispersed storage sites which is easily and dynamically expandable and optimized for high availability and scalability. The architecture and implementation in term of web-services running inside the Advanced Resource Connector Hosting Environment Dameon (ARC HED) are described and results of tests in both local -area and wide-area networks that demonstrate the fault tolerance, stability and scalability of Chelonia will be presented. In addition, example setups for production deployments for small and medium-sized VO's are described.
120705876
Presentation of search results: the CLs technique
I describe a framework for the presentation of search results which is motivated by frequentist statistics. The most well-known use of this framework is for the combined search for the Higgs boson at LEP. A toy neutrino oscillations experiment is used to illustrate the rich information available in the framework for exclusion and discovery. I argue that the so-called CLs technique for setting limits is appropriate for determining exclusion intervals while the determination of confidence intervals advocated by Feldman and Cousins' method is more appropriate for treating established signals, i.e. going beyond discovery to measurement. (From the workshop 'Advanced Statistical Techniques in Particle Physics', 18–22 March 2002)
110699804
The small angle tile calorimeter project in DELPHI
The new Small Angle TIIe Calorimeter (STIC) covers the forward regions in DELPHI. The main motivation for its construction was to achieve a systematic error of 0.1% on the luminosity determination. This detector consists of a “shashlik” type calorimeter, equipped with two planes of silicon pad detectors placed respectively after 4 and 7.4 radiation lengths. A veto counter, composed of two scintillator planes, covers the front of the calorimeter to allow ϱ − γ separation and to provide a neutral energy trigger. The physics motivations for this project, results from extensive testbeam measurements and the performance during the 1994 LEP run are reported here.
123280964
High-energy elastic scattering of pi-plus-minus, k-minus, and anti-p on hydrogen at c.m. angles from 22 degrees to 180 degrees
123560560
Inelastic high-energy proton proton collisions
118121131
USE OF THE 3.5-MRAD BEAM FOR ELECTRONS.
121010683
PARTICLE PRODUCTION BY 10-30 Bev PROTONS INCIDENT ON Al AND Be
The production of p-bar, mesons ( pi /sup s), and mesons (K/sup s) by the interaction of protons on Al and Be targets is studied at energies of 10, 20, and 30 Bev. The production ratios and momenta of these particles are measured at angles of 4.75, 9, 13, and 20 deg . (T.F.H.)
124067127
PROGRESS REPORT ON THE 200-GeV ACCELERATOR OF THE NATIONAL ACCELERATOR LABORATORY.