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Showing 1 to 18 of 18 for “"CMS-Detektor"”.
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Präzisionsmessungen an Myondriftkammern für den CMS-Detektor und die Bedeutung des Myonsystems für die Higgs-Suche am LHC
… deals with preparations for the experiment CMS (Compact Muon Solenoid) of the LHC (Large Hadron Collider) planned at CERN in Geneva (Switzerland). The construction of the muon system, especially of the drift chambers in the barrel detector constructed with participation of the Aachen group, …
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Characterization of the CMS pixel detectors
… system makes up the innermost part of the CMS experiment, which is one of the two general purpose detectors at the LHC. The main tasks of the system are vertex detection and flavor tagging. The high luminosity and the high particle multiplicity as well as the small bunch spacing at the LHC …
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Experiences with a pre-series of micro strip gas counters with gas electron multipliers for high rate applications
… tracking system of the Compact Muon Solenoid (CMS) experiment at the future Large Hadron Collider (LHC) at the Centre de Recherche Nucleaire (CERN) with MSGCs. In the barrel part of the tracker, plain MSGCs were to be used. For the forward part, the MSGC+GEM technology was envisaged. This …
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Deformation studies on CMS endcap modules and misalignment studies on the CMS tracker
… of detector modules located in the endcap of the CMS tracker * The effect of misalignment of the tracker support structure on the performance of the CMS tracker 0.1 Deformation Measurements In chapter two the possible deformations of the TEC modules under temperature changes have been …
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Silicon strip detector qualification for the CMS experiment
The Compact Muon Solenoid (CMS) is one of the four experiments being installed at the Large Hadron Collider (LHC) which is located at the european organization for nuclear research CERN in Geneva. This proton-proton collider will explore a new energy regime of up to 14 TeV center-of-mass energy. To …
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Development of a test system for the quality assurance of silicon microstrip detectors for the inner tracking system of the CMS experiment
… tracking system of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) which is being built at the European Laboratory for Particle Physics CERN (Geneva, Switzerland) will be equipped with two different technologies of silicon detectors. While the innermost tracker …
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Study of the sensitivity of CMS to the lepton flavour violating neutrinoless tau decay tau mymymy
… tau lepton production cross-section for the CMS experiment, at a center-of-mass energy of 14 TeV, is about 140 µb. Assuming an integrated luminosity of 10 fb^-1 per year, which is expected to be reached in the low luminosity phase of L = 2*10^33 cm^-2s^-1, about 10^12 tau leptons are produced …
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Systementwicklungen und Messungen zur Auslese und Kalibration von CMS pipeline chips für die angewandte Forschung und Serientests an CMS-Streifendetektoren
… accelerator LHC at CERN serves for the CMS experiment as a high rate source of deep inelastic interactions of quarks and gluons. CMS at the LHC will be one of the "discovery machines" for new particles and theories. The central tracker in the superconducting 4 T-magnet of CMS has to …
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Development and evaluation of a test system for the quality assurance during the mass production of silicon microstrip detector modules for the CMS experiment
The Compact Muon Solenoid (CMS) is one of four large-scale experiments that is going to be installed at the Large Hadron Collider (LHC) at the European Laboratory for Particle Physics (CERN). For CMS an inner tracking system entirely equipped with silicon microstrip detectors was chosen. With an …
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Integration of the end cap TEC+ of the CMS silicon strip tracker
… these experiments is the multi-purpose detector CMS whose aim it is to discover and investigate new physical phenomena that might become accessible by virtue of the high center-of-mass energy and luminosity of the LHC. Two of the most intensively studied possibilities are the discovery of the …
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Expected measurement of the Z production rate with the CMS detector and simulation of the Tracker Laser Alignment System
… are foreseen for 2009. The Compact Muon System (CMS) detector will measure the particles created in the hadron collisions and can confirm the Standard Model by establishing the existence of the Higgs boson, but also search for new phenomena. In order to provide a robust and precise track …
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Entwicklung von Objekt orientierten C++ Algorithmen zur b-Quark Identifikation
… capability of b-quark signatures in the CMS experiment at the LHC. In order to test the b-quark identification methods developed, the data of the ALEPH experiment recorded at the LEP e+e- storage ring from 1992 till 1995 were used. The strategies developed for events from e+e- collisions …
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Development and evaluation of test stations for the quality assurance of the silicon micro-strip detector modules for the CMS experiment
CMS (Compact Muon Solenoid) is one of four large-scale detectors which will be operated at the LHC (Large Hadron Collider) at the European Laboratory for Particle Physics (CERN). For the search for new physics the reconstruction of the collision products and their properties is essential. In the …
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Construction of the CMS tracker end-caps and an impact study on defects
The CMS experiment at the LHC accelerator at the research center CERN close to Geneva will study proton proton collisions at up to now unprecedented center of mass energies from the year 2008 on. To discover theoretically predicted elementary particles, CMS was equipped with the largest silicon …
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Top quark mass measurement in the Lepton+Jets channel using full simulation of the CMS detector
… at the LHC and the Compact Muon Solenoid (CMS) detector, this thesis deals with the analyses of top quark reconstruction and mass measurement in two different scenarios. In the first analysis a first physics scenario is taken as a basis where no jet flavour information (e.g. b tagging) and …
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Implementation of a model independent search for new physics with the CMS detector exploiting the world-wide LHC computing grid
… experiments, namely the Compact Muon Solenoid (CMS), is trying to quantify the understanding of the Standard Model and is hunting for deviations from the expectation by investigating a large fraction of the CMS data. While the classical approach for searches of physics beyond the Standard Model …
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Search for supersymmetry in opposite sign dilepton final states with the CMS experiment
… data from the LHC recorded with the CMS detector during 2010, corresponding to an integrated luminosity of 36~pb^{-1}. No evidence for an anomalous event yield beyond Standard Model expectations is found. An upper limit on the non Standard Model contribution in the signal region is …
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Tests of the data acquisition system and detector control system for the muon chambers of the CMS experiment at the LHC
… muon chambers for the barrel muon system of the CMS detector at the LHC at CERN (Geneva). The thesis describes some test procedures which were developed and performed for the chamber local Data Acquisition (DAQ) system, as well as for parts of the Detector Control System (DCS). The test results …