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A. CERVERA VILLANUEVA (University of Geneva)30/09/2004, 10:00Track 2 - Event processingposterWe have developed a c++ software package, called "RecPack", which allows the reconstruction of dynamic trajectories in any experimental setup. The basic utility of the package is the fitting of trajectories in the presence of random and systematic perturbations to the system (multiple scattering, energy loss, inhomogeneous magnetic fields, etc) via a Kalman Filter fit. It also...Go to contribution page
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30/09/2004, 10:00Track 3 - Core SoftwareposterBuilding a state of the art high energy physics detector like CMS requires strict interoperability and coherency in the design and construction of all sub-systems comprising the detector. This issue is especially critical for the many database components that are planned for storage of the various categories of data related to the construction, operation, and maintainance of the...Go to contribution page
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F. Gray (UNIVERSITY OF CALIFORNIA, BERKELEY)30/09/2004, 10:00Track 3 - Core SoftwareposterThe muCap experiment at the Paul Scherrer Institut (PSI) will measure the rate of muon capture on the proton to a precision of 1% by comparing the apparent lifetimes of positive and negative muons in hydrogen. This rate may be related to the induced pseudoscalar weak form factor of the proton. Superficially, the muCap apparatus looks something like a miniature model of a collider...Go to contribution page
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A. Di Meglio (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterSoftware Configuration Management (SCM) Patterns and the Continuous Integration method are recent and powerful techniques to enforce a common software engineering process across large, heterogeneous, rapidly changing development projects where a rapid release lifecycle is required. In particular the Continuous Integration method allows tracking and addressing problems in the...Go to contribution page
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W. Waltenberger (HEPHY VIENNA)30/09/2004, 10:00Track 2 - Event processingposterState of the art in the field of fitting particle tracks to one vertex is the Kalman technique. This least-squares (LS) estimator is known to be ideal in the case of perfect assignment of tracks to vertices and perfectly known Gaussian errors. Experimental data and detailed simulations always depart from this perfect model. The imperfections can be expected to be larger in high...Go to contribution page
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30/09/2004, 10:00Track 3 - Core SoftwareposterIn addition to the well-known challenges of computing and data handling at LHC scales, LHC experiments have also approached the scalability limit of manual management and control of the steering parameters ("primary numbers") provided to their software systems. The laborious task of detector description benefits from the implementation of a scalable relational database approach. We...Go to contribution page
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A. Undrus (BROOKHAVEN NATIONAL LABORATORY, USA)30/09/2004, 10:00Track 3 - Core SoftwareposterSoftware testing is a difficult, time-consuming process that requires technical sophistication and proper planning. This is especially true for the large-scale software projects of High Energy Physics where constant modifications and enhancements are typical. The automated nightly testing is the important component of NICOS, NIghtly COntrol System, that manages the multi-platform nightly...Go to contribution page
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M. Stoufer (LAWRENCE BERKELEY NATIONAL LAB)30/09/2004, 10:00Track 3 - Core SoftwareposterAs any software project grows in both its collaborative and mixed codebase nature, current tools like CVS and Maven start to sag under the pressure of complex sub-project dependencies and versioning. A developer-wide failure in mastery of these tools will inevitably lead to an unrecoverable instability of a project. Even keeping a single software project stable in a large collaborative...Go to contribution page
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Mr V. Onuchin (CERN, IHEP)30/09/2004, 10:00Track 2 - Event processingposterCarrot is a scripting module for the Apache webserver. Based on the ROOT framework, it has a number of powerful features, including the ability to embed C++ code into HTML pages, run interpreted and compiled C++ macros, send and execute C++ code on remote web servers, browse and analyse the remote data located in ROOT files with the web browser, access and manipulate databases, and...Go to contribution page
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A. Zaytsev (BUDKER INSTITUTE OF NUCLEAR PHYSICS)30/09/2004, 10:00Track 3 - Core SoftwareposterCMD-3 is the general purpose cryogenic magnetic detector for VEPP-2000 electron-positron collider, which is being commissioned at Budker Institute of Nuclear Physics (BINP, Novosibirsk, Russia). The main aspects of physical program of the experiment are study of known and search for new vector mesons, study of the ppbar a nnbar production cross sections in the vicinity of the threshold and...Go to contribution page
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K. Rabbertz (UNIVERSITY OF KARLSRUHE)30/09/2004, 10:00Track 3 - Core SoftwareposterFor data analysis in an international collaboration it is important to have an efficient procedure to distribute, install and update the centrally maintained software. This is even more true when not only locally but also grid accessible resources are to be exploited. A practical solution will be presented that has been successfully employed for CMS software installations on systems...Go to contribution page
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M.S. Mennea (UNIVERSITY & INFN BARI)30/09/2004, 10:00Track 2 - Event processingposterThis document will review the design considerations, implementations and performance of the CMS Tracker Visualization tools. In view of the great complexity of this subdetector (more than 50 millions channels organized in 17000 modules each one of these being a complete detector), the standard CMS visualisation tools (IGUANA and IGUANACMS) that provide basic 3D capabilities and...Go to contribution page
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M.G. Pia (INFN GENOVA)30/09/2004, 10:00Track 2 - Event processingposterA Toolkit for Statistical Data Analysis has been recently released. Thanks to this novel software system, for the first time an ample set of sophisticated algorithms for the comparison of data distributions (goodness of fit tests) is made available to the High Energy Physics community in an open source product. The statistical algorithms implemented belong to two sets, for the...Go to contribution page
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D. KLOSE (Universidade de Lisboa, Portugal)30/09/2004, 10:00Track 3 - Core SoftwareposterConditions Databases are beginning to be widely used in the ATLAS experiment. Conditions data are time-varying data describing the state of the detector used to reconstruct the event data. This includes all sorts of slowly evolving data like detector alignment, calibration, monitoring and data from Detector Control System (DCS). In this paper we'll present the interfaces between the...Go to contribution page
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Mr W. Waltenberger (Austrian Academy of Sciences // Institute of High Energy Physics)30/09/2004, 10:00Track 2 - Event processingposterA proposal is made for the design and implementation of a detector-independent vertex reconstruction toolkit and interface to generic objects (VERTIGO). The first stage aims at re- using existing state-of-the-art algorithms for geometric vertex finding and fitting by both linear (Kalman filter) and robust estimation methods. Prototype candidates for the latter are a wide range of...Go to contribution page
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Dr E. Chabanat (IN2P3)30/09/2004, 10:00Track 2 - Event processingposterCMS and others LHC experiments offer a new challenge for the vertex reconstruction: the elaboration of efficient algorithms at high-luminosity beam collisions. We present here a new algorithm in the vertex finding field : Deterministic Annealing (DA). This algorithm comes from information theory by analogy to statistical physics and has already been used in clustering and classification...Go to contribution page
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30/09/2004, 10:00Track 2 - Event processingposterA simultaneous track finding / fitting procedure based on Kalman filtering approach has been developed for the forward muon spectrometer of ALICE experiment. In order to improve the performance of the method in high-background conditions of the heavy ion collisions the "canonical" Kalman filter has been modified and supplemented by a "smoother" part. It is shown that the resulting...Go to contribution page
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V M. Moreira do Amaral (UNIVERSITY OF MANNHEIM)30/09/2004, 10:00Track 3 - Core SoftwareposterThere is a permanent quest for user friendliness in HEP Analysis. This growing need is directly proportional to the analysis frameworks' interface complexity. In fact, the user is provided with an analysis framework that makes use of a General Purpose Language to program the query algorithms. Usually the user finds this overwhelming, since he or she is presented with the complexity of...Go to contribution page
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Dr S. Pardi (DIPARTIMENTO DI MATEMATICA ED APPLICAZIONI "R.CACCIOPPOLI")30/09/2004, 10:00Track 2 - Event processingposterThe algorithms for the detection of gravitational waves are usually very complex due to the low signal to noise ratio. In particular the search for signals coming from coalescing binary systems can be very demanding in terms of computing power, like in the case of the classical Standard Matched Filter Technique. To overcome this problem, we tested a Dynamic Matched Filter Technique,...Go to contribution page
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M.G. Pia (INFN GENOVA)30/09/2004, 10:00Track 3 - Core SoftwareposterThe adoption of a rigorous software process is well known to represent a key factor for the quality of the software product and the most effective usage of the human resources available to a software project. The Unified Process, in particular its commercial packaging known as the RUP (Rational Unified Process) has been one of the most widely used software process models in the...Go to contribution page
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B. White (STANFORD LINEAR ACCELERATOR CENTER (SLAC))30/09/2004, 10:00Track 2 - Event processingposterThe Electron Gamma Shower (EGS) Code System at SLAC is designed to simulate the flow of electrons, positrons and photons through matter at a wide range of energies. It has a large user base among the high-energy physics community and is often used as a teaching tool through a Web interface that allows program input and output. Our work aims to improve the user interaction and shower...Go to contribution page
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S. Guatelli (INFN Genova, Italy)30/09/2004, 10:00Track 2 - Event processingposterThe study of the effects of space radiation on astronauts in an important concern of space missions for the exploration of the Solar System. The radiation hazard to crew is critical to the feasibility of interplanetary manned missions. To protect the crew, shielding must be designed, the environment must be anticipated and monitored, and a warning system must be put in place. A...Go to contribution page
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J. Hrivnac (LAL)30/09/2004, 10:00Track 3 - Core SoftwareposterGraXML is the framework for manipulation and visualization of 3D geometrical objects in space. The full framework consists of the GraXML toolkit, libraries implementing Generic and Geometric Models and end-user interactive front-ends. GraXML Toolkit provides a foundation for operations on 3D objects (both detector elements and events). Each external source of 3D data is...Go to contribution page
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A. Valassi (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterThe migration of the Harp data and software from an Objectivity- based to an Oracle-based data storage solution is reviewed in this presentation. The project, which was successfully completed in January 2004, involved three distinct phases. In the first phase, which profited significantly from the previous COMPASS data migration project, 30 TB of Harp raw event data were migrated in...Go to contribution page
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T. Baron (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterCHEP 2004 conference is using the Integrated Digital Conferencing product to manage part of its web site and processes to run the conference. This software has been built in the framework of InDiCo European Project. It is designed to be generic and extensible with the goal of providing help for single seminars as well as large conferences management. Partly developped at CERN within...Go to contribution page
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E. Poinsignon (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterThe External Software Service of the LCG SPI project provides open source and public domain packages required by the LCG projects and experiments. Presently, more than 50 libraries and tools are provided for a set of platforms decided by the architect forum. All packages are installed following a standard procedure and are documented on the web. A set of scripts has been developed...Go to contribution page
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M. Stavrianakou (FNAL)30/09/2004, 10:00Track 2 - Event processingposterThe CMS Geant4-based Simulation Framework, Mantis, is a specialization of the COBRA framework, which implements the CMS OO architecture. Mantis, which is the basis for the CMS-specific simulation program OSCAR, provides the infrastructure for the selection, configuration and tuning of all essential simulation elements: geometry construction, sensitive detector and magnetic field...Go to contribution page
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N. Graf (SLAC)30/09/2004, 10:00Track 2 - Event processingposterWe discuss techniques used to access legacy event generators from modern simulation environments. Examples will be given of our experience within the linear collider community accessing various FORTRAN-based generators from within a Java environment. Coding to a standard interface and use of shared object libraries enables runtime selection of generators, and allows for extension of...Go to contribution page
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Dr M. Biglietti (UNIVERSITY OF MICHIGAN)30/09/2004, 10:00Track 2 - Event processingposterAt LHC the 40 MHz bunch crossing rate dictates a high selectivity of the ATLAS Trigger system, which has to keep the full physics potential of the experiment in spite of a limited storage capability. The level-1 trigger, implemented in a custom hardware, will reduce the initial rate to 75 kHz and is followed by the software based level-2 and Event Filter, usually referred as High Level...Go to contribution page
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A. Schmidt (Institut fuer Experimentelle Kernphysik, Karlsruhe University, Germany)30/09/2004, 10:00Track 2 - Event processingposterAt CHEP03 we introduced "Physics Analysis eXpert" (PAX), a C++ toolkit for advanced physics analyses in High Energy Physics (HEP) experiments. PAX introduces a new level of abstraction beyond detector reconstruction and provides a general, persistent container model for HEP events. Physics objects like fourvectors, vertices and collisions can easiliy be stored, accessed and manipulated....Go to contribution page
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O. Link (CERN, PH/SFT)30/09/2004, 10:00Track 2 - Event processingposterTwisted trapezoids are important compontents in the LAr end cap calorimeter of the Atlas detector. A similar solid, the so-called twisted tubs consists of two end planes, inner and outer hyperboloidal surfaces, and twisted surfaces, and is an indispensable component for cylindrical drift chambers (see K. Hoshina et al, Computer Physics Communications 153 (2003) 373-391). In Geant3...Go to contribution page
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G B. Barrand (CNRS / IN2P3 / LAL)30/09/2004, 10:00Track 2 - Event processingposterOpenPAW is for people that definitively do not want to quit the PAW command prompt, but seek anyway an implementation based over more modern technologies. We shall present the OpenScientist/Lab/opaw program that offers a PAW command prompt by using the OpenScientist tools (then C++, Inventor for doing graphic, Rio for doing the IO, OnX for the GUI, etc...). The OpenScientist/Lab...Go to contribution page
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S. Schmid (ETH Zurich)30/09/2004, 10:00Track 3 - Core SoftwareposterLHC experiments have large amounts of software to build. CMS has studied ways to shorten project build times using parallel and distributed builds as well as improved ways to decide what to rebuild. We have experimented with making idle desktop and server machines easily available as a virtual build cluster using distcc and zeroconf. We have also tested variations of ccache and more...Go to contribution page
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C. Jones (CORNELL UNIVERSITY)30/09/2004, 10:00Track 3 - Core SoftwareposterA common task for a reconstruction/analysis system is to be able to output different sets of events to different permanent data stores (e.g. files). This allows multiple related logical jobs to be grouped into one process and run using the same input data (read from a permanent data store and/or created from an algorithm). In our system, physicists can specify multiple output 'paths',...Go to contribution page
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J. Hrivnac (LAL)30/09/2004, 10:00Track 3 - Core SoftwareposterThere are two kinds of analysis objects with respect to their persistent requirements: * Objects, which need direct access to the persistency service only for their IO operations (read/write/update/...): histograms, clouds, profiles, ... All Persistency requirements for those objects can be implemented by standard Transient-Persistent Separation techniques like JDO, Serialization,...Go to contribution page
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Dr S. Cucciarelli (CERN)30/09/2004, 10:00Track 2 - Event processingposterThe Pixel Detector is the innermost one in the tracking system of the Compact Muon Solenoid (CMS) experiment. It provides the most precise measurements not only supporting the full track reconstruction but also allowing the standalone reconstruction useful especially for the online event selection at High-Level Trigger (HLT). The performance of the Pixel Detector is given. The HLT...Go to contribution page
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V. Kuznetsov (CORNELL UNIVERSITY)30/09/2004, 10:00Track 3 - Core SoftwareposterLinux operating system has become the platform of choice in the HEP community. However, the migration process from another operating system to Linux can be a tremendous effort for developers and system administrators. The ultimate goal of such a transition is to maximize agreement between the final results of identical calculations on the different platforms. Apart from the fine tuning of...Go to contribution page
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I. Reguero (CERN, IT DEPARTMENT), J A. Lopez-Perez (CERN, IT DEPARTMENT)30/09/2004, 10:00Track 3 - Core SoftwareposterOur goal is two fold. On one hand we wanted to address the interest of CMS users to have LCG Physics analysis environment on Solaris. On the other hand we wanted to assess the difficulty of porting code written in Linux without particular attention to portability to other Unix implementations. Our initial assumption was that the difficulty would be manageable even for a very small team....Go to contribution page
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M.G. Pia (INFN GENOVA)30/09/2004, 10:00Track 2 - Event processingposterThe Geant4 Toolkit provides an ample set of alternative and complementary physics models to handle the electromagnetic interactions of leptons, photons, charged hadrons and ions. Because of the critical role often played by simulation in the experimental design and physics analysis, an accurate validation of the physics models implemented in Geant4 is essential, down to the...Go to contribution page
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W. Lavrijsen (LBNL)30/09/2004, 10:00Track 3 - Core SoftwareposterA software bus, just like its hardware equivalent, allows for the discovery, installation, configuration, loading, unloading, and run-time replacement of software components, as well as channeling of inter-component communication. Python, a popular open-source programming language, encourages a modular design on software written in it, but it offers little or no component functionality....Go to contribution page
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V. Onuchin (CERN, IHEP)30/09/2004, 10:00Track 3 - Core SoftwareposterThe RDBC (ROOT DataBase Connectivity) library is a C++ implementation of the The Java Database Connectivity Application Programming Interface. It provides a DBMS-independent interface to relational databases from ROOT as well as a generic SQL database access framework. RDBC also extends the ROOT TSQL abstract interface. Currently it is used in two large experiments: - in Minos as...Go to contribution page
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C. ARNAULT (CNRS)30/09/2004, 10:00Track 3 - Core SoftwareposterSince its introduction in 1999, CMT is now used as a production tool in many large software projects for physics research (ATLAS, LHCb, Virgo, Auger, Planck). Although its basic concepts remain unchanged since the beginning, proving their viability, it is still improving and increasing its coverage of the configuration management mechanisms. Two important evolutions have recently been...Go to contribution page
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G B. Barrand (CNRS / IN2P3 / LAL)30/09/2004, 10:00Track 3 - Core SoftwareposterRio (for ROOT IO) is a rewriting of the file IO system of ROOT. We shall present our strong motivations of doing this tedious work. We shall present the main choices done in the Rio implementation (then by opposition to what we don't like in ROOT). For example, we shall say why we believe that an IO package is not a drawing package (no TClass::Draw) ; why someone should use...Go to contribution page
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30/09/2004, 10:00Track 2 - Event processingposterThe ROOT geometry package is a tool designed for building, browsing, tracking and visualizing a detector geometry. The code is independent from other external MC for simulation, therefore it does not contain any constraints related to physics. However, the package defines a number of hooks for tracking, such as media, materials, magnetic field or track state flags, in order to allow...Go to contribution page
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I. Antcheva (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterThe GUI is a very important component of the ROOT framework. Its main purpose is to improve the usability and end-user perception. In this paper, we present two main projects in this direction: the ROOT graphics editor and the ROOT GUI builder. The ROOT graphics editor is a recent addition to the framework. It provides a state of the art and an intuitive way to create or edit objects...Go to contribution page
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P. Nevski (BROOKHAVEN NATIONAL LABORATORY)30/09/2004, 10:00Track 2 - Event processingposterThe ATLAS detector is a sophisticated multi-purpose detector with over 10 million electronics channels designed to study high-pT physics at LHC. Due to their high multiplicity, reaching almost hundred thousand particles per event, heavy ion collisions pose a formidable computational challenge. A set of tools have been created to realistically simulate and fully reconstruct the most...Go to contribution page
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E. Tcherniaev (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterThis paper discusses some key points in the organization of the HARP software. In particular it describes the configuration of the packages, data and code management, testing and release procedures. Development of the HARP software is based on incremental releases with strict respect of the design structure. This poses serious challenges to the software management, which has gone...Go to contribution page
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C. Jones (CORNELL UNIVERSITY)30/09/2004, 10:00Track 3 - Core SoftwareposterGeneric programming as exemplified by the C++ standard library makes use of functions or function objects (objects that accept function syntax) to specialize generic algorithms for particular uses. Such separation improves code reuse without sacrificing efficiency. We employed this same technique in our combinatoric engine: DChain. In DChain, physicists combine lists of child particles...Go to contribution page
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A. Pfeiffer (CERN, PH/SFT)30/09/2004, 10:00Track 3 - Core SoftwareposterIn the context of the LHC Computing Grid (LCG) project, the Applications Area develops and maintains that part of the physics applications software and associated infrastructure that is shared among the LHC experiments. The Physicist Interface (PI) project of the LCG Application Area encompasses the interfaces and tools by which physicists will directly use the software. In...Go to contribution page
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Mei Ye30/09/2004, 10:00Track 1 - Online ComputingposterThis article describes the simulation of the read-out subsystem which will be subject to the BESIII data acquisition system. According to the purpose of the BESIII, the event rate will be about 4000Hz, and the data rate up to 50Mbytes/sec after Level 1 trigger. The read-out subsystem consists of some read-out crates and read-out computer whose principle function is to collect event...Go to contribution page
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Dr G. Folger (CERN)30/09/2004, 10:00Track 2 - Event processingposterGeant4 is a toolkit for the simulation of the passage of particles through matter. Amongst its applications are hadronic calorimeters of LHC detectors and simulation of radiation environments. For these types of simulation, a good description of secondaries generated by inelastic interactions of primary nucleons and pions is particularly important. The Geant4 Binary Cascade is a...Go to contribution page
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Dr M. Whalley (IPPP, UNIVERSITY OF DURHAM)30/09/2004, 10:00Track 2 - Event processingposterWe will describe the plans and objectives of the recently funded PPARC(UK) e-science project, the Combined E-Science Data Analysis Resource for High Energy Physics (CEDAR), which will combine the strengths of the well established and widely used HEPDATA library of HEP data and the innovative JETWEB Data/Monte Carlo comparison facility built on the HZTOOL package and which exploits...Go to contribution page
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Vakhtang tsulaia30/09/2004, 10:00Track 2 - Event processingposterThe ATLAS Detector consists of several major subsytems: an inner detector composed of pixels, microstrip detectors and a transition radiation tracker; electromagnetic and hadronic calorimetry, and a muon spectrometer. Over the last year, these systems have been described in terms of a set of geometrical primitives known as GeoModel. Software components for detector description interpret...Go to contribution page
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Dr V. Tioukov (INFN NAPOLI)30/09/2004, 10:00Track 2 - Event processingposterOPERA is a massive lead/emulsion target for a long-baseline neutrino oscillation search. More then 90% of the useful experimental data in OPERA will be produced by the scanning of emulsion plates with the automatic microscopes. The main goal of the data processing in OPERA will be the search, analysis and identification of primary and secondary vertexes produced by neutrino in...Go to contribution page
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L. Nellen (I. DE CIENCIAS NUCLEARES, UNAM)30/09/2004, 10:00Track 3 - Core SoftwareposterThe Pierre Auger Observatory consists of two sites with several semi-autonomous detection systems. Each component, and in some cases each event, provides a preferred coordinate system for simulation and analysis. To avoid a proliferation of coordinate systems in the offline software of the Pierre Auger Observatory, we have developed a geometry package that allows the treatment of...Go to contribution page
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Y. Perrin (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterA web portal has been developed, in the context of the LCG/SPI project, in order to coordinate workflow and manage information in large software projects. It is a development of the GNU Savannah package and offers a range of services to every hosted project: Bug / support / patch trackers, a simple task planning system, news threads, and a download area for software releases. Features...Go to contribution page
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R. Brun (CERN)30/09/2004, 10:00Track 3 - Core SoftwareposterThe ROOT linear algebra package has been invigorated . The hierarchical structure has been improved allowing different flavors of matrices, like dense and symmetric . A fairly complete set of matrix decompositions has been added to support matrix inversions and solving linear equations. The package has been extensively compared to other algorithms for its accuracy and...Go to contribution page
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S. Albrand (LPSC)30/09/2004, 10:00Track 3 - Core SoftwareposterThe Tag Collector is a web interfaced database application for release management. The tool is tightly coupled to CVS, and also to CMT, the configuration management tool. Developers can interactively select the CVS tags to be included in a build, and the complete build commands are produced automatically. Other features are provided such as verification of package CMT requirements files,...Go to contribution page
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A. Salzburger (UNIVERSITY OF INNSBRUCK)30/09/2004, 10:00Track 2 - Event processingposterThe ATLAS reconstruction software requires extrapolation to arbitrary oriented surfaces of different types inside a non-uniform magnetic field. In addition multiple scattering and energy loss effects along the propagated trajectories have to be taken into account. A good performace in respect of computing time consumption is crucial due to hit and track multiplicity in high luminosity...Go to contribution page
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D. Klose (Universidade de Lisboa, Portugal)30/09/2004, 10:00Track 3 - Core SoftwareposterA common LCG architecture for the Conditions Database for the time evolving data enables the possibility to separate the interval-of- validity (IOV) information from the conditions data payload. The two approaches can be beneficial in different cases and separation presents challenges for efficient knowledge discovery, navigation and data visualization. In our paper we describe the...Go to contribution page
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Dimitri gladkov30/09/2004, 10:00Track 2 - Event processingposterThe design, implementation and performance of the ZEUS Global Tracking Trigger (GTT) Forward Algorithm is described. The ZEUS GTT Forward Algorithm integrates track information from the ZEUS Micro Vertex Detector (MVD) and forward Straw Tube Tracker (STT) to provide a picture of the event topology in the forward direction ($1.5<\eta <3$ ) of the ZEUS detector. This region is...Go to contribution page
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Dr E. Gerchtein (CMU)30/09/2004, 10:00Track 2 - Event processingposterLong lived charged hyperon, $\Xi$ and $\Omega$, are capable of travelling significant distances producing hits in the silicon detector, before decaying into $\Lambda^0 \pi$ and $\Lambda^0 K$ pairs, respectively. This gives unique opportunity of reconstructiong hyperon tracks. We have developed a dedicated "outside-in" tracking algorithm that is seeded by 4-momentum and decay vertex...Go to contribution page
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C. Leggett (LAWRENCE BERKELEY NATIONAL LABORATORY)30/09/2004, 10:00Track 3 - Core SoftwareposterIt is essential to provide users transparent access to time varying data, such as detector misalignments, calibration parameters and the like. This data should be automatically updated, without user intervention, whenever it changes. Furthermore, the user should be able to be notified whenever a particular datum is updated, so as to perform actions such as re-caching of compound results,...Go to contribution page
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30/09/2004, 10:00Track 2 - Event processingposterValidation of hadronic physics processes of the Geant4 simulation toolkit is a very important task to ensure adequate physics results for the experiments being built at the Large Hadron Collider. We report on simulation results obtained using the Geant4 Bertini cascade double-differential production cross-sections for various target materials and incident hadron kinetic energies between...Go to contribution page
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Mr A. Kulikov (Joint Institute for Nuclear Research, Dubna, Russia.)30/09/2004, 10:00Track 2 - Event processingposterUsing the modern 3D visualization software and hardware to represent the object models of the HEP detectors would create the impressive pictures of events and the detail views of the detectors facilitating the design, simulation and data analysis and representation the huge amount of the information flooding the modern HEP experiments. In this paper we represent the work made by members...Go to contribution page
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T. Todorov (CERN/IReS)30/09/2004, 10:00Track 2 - Event processingposterThe simulation, reconstruction and analysis software access to the magnetic field has large impact both on CPU performance and on accuracy. An approach based on a volume geometry is described. The volumes are constructed in such a way that their boundaries correspond to field discontinuities, which are due to changes in magnetic permeability of the materials. The field in each...Go to contribution page
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