Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 70 for “"CMS-Detector"”.
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Diboson physics with CMS detector
… in pp collision with the Compact Muon Solenoid (CMS) detector at Large Hadron Collider (LHC). A study of Z+gamma process is performed on the data collected by the CMS during 2011 and corresponding to integrated luminosity L= 5 fb[superscript]-1. The study consists of two parts: cross section …
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Measurement of [gamma](1S) spin alignment with the CMS detector
… Hadron Collider using the Compact Muon Solenoid detector. Approximately 1 fb-1 of data taken during the year 2011 is analyzed. The decay to two muons is used to identify these decays, and the angular distribution of the two muons is measured. The method is designed to measure the tensor …
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Measurement of [formula] in Associated Production with the CMS Detector
… cross section of [formula] is measured with the CMS Detector. The Simplified Template Cross Section framework is used. The inclusive strength of the measured signal relative to the Standard Model is [formula], which agrees with the Standard Model within 2.1 standard deviations. The measured …
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Jet quenching in heavy-ion collisions at LHC with CMS detector
… of correlations of jet pairs as measured by the CMS detector at LHC. The implications of the results are discussed by comparison of simple models with data. It is observed that the geometrical configuration of the dijets and the nuclear collision region plays an important role in the correlations …
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Evidence for a Higgs boson in tau decays with the CMS detector
In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying to ail electron, a muon, and neutrinos. The search is performed using data collected from proton-proton collisions by the Compact Muon Solenoid experiment at …
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A study of tau identification with the CMS detector at the LHC
… will be collected by the Compact Muon Solenoid (CMS) detector on the Large Hadron Collider (LHC) at CERN. The two components of particle identification, efficiencies of [tau] identification from generator level information, along with fake rates of the current default algorithm have been …
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Search for supersymmetric particles in opposite sign dilepton events with the CMS detector
… particles in the data collected by CMS at center of mass energy of 7 TeV is presented. The search is focused on the selection of events characterized by pairs of opposite sign electrons or muons. This particular exclusive signature (which we refer to as opposite sign dilepton …
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Flow of [phi] mesons in pPb collisions at the LHC with the CMS detector
… center-ofmass energy of 5.02 TeV with the CMS detector, corresponds to a total integrated luminosity of aproximately 35nb-1. [Phi]-mesons are reconstructed via their hadronic decay channel, [phi] --> K+K-, for high multiplicity events. The observed two-particle long range correlations are …
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Charged multiplicity measurement for simulated pp events in the Compact Muon Solenoid (CMS) detector
… collisions in the Compact Muon Solenoid (CMS) experiment at LHC energies ... This technique involves counting reconstructed hits in the innermost layer of the pixel tracker. By using the relationship between pseudorapidity and deposited charge of the hits, we can distinguish between signal …
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Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector
… information in the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). In particular, we carry out three central investigations: the determination of electron efficiencies, electron fake rates, and ZZ -->4l(e, [mu]) cross sections. Reconstructed Z boson decays are used …
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Simulation of measuring bottom quark flow in heavy ion collisions using the CMS detector
… digitization, and reconstruction modules of the CMSSW software framework. Studies of these data produce information necessary to create a flow signal simulator, and attempts are made at suggesting values for experimental cuts in PT and DCA to reduce backgrounds. Using the signal simulator, it is …
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Measurement of the Drell--Yan differential cross section with the CMS detector at the LHC
… 8\TeV recorded with the Compact Muon Solenoid detector at the CERN Large Hadron Collider during the first years of operation. Measurements of the differential Drell–Yan cross section in the dimuon and dielectron channels covering the dilepton mass range of 15 to 2000\GeV and absolute dilepton …
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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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Observation and measurement of a standard model Higgs Boson-like diphoton resonance with the CMS detector
… boson through its decay into two photons at the CMS experiment at CERN's Large Hadron Collider (LHC), on the full LHC "Run I" data collected by the CMS detector during 2011 and 2012, consisting of proton-proton collision events at [square root of] s = 7 TeV with L = 5.1 fb-1 and at [square root …
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Characterization of jets in heavy ion collisions using photons at the LHC with the CMS detector
Using the CMS detector at the LHC, a quantitative study of jet energy loss and angular deflection inside the high energy-density medium formed in PbPb collisions is made. Photons are used to measure the initial state of a color-charged probe while jet reconstruction is used to measure the final …
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Measurement of the charged-hadron multiplicity in proton-proton collisions at LHC with the CMS detector
… measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield was obtained by counting the number of hit-pairs (tracklets). The charged-particle multiplicity per unit of pseudorapidity dNch/d[eta] [eta]<0.5 at [the square root of sigma] = 7.0 TeV is 5.78 i …
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Search for new physics in events with high transverse momentum leptons with the CMS detector at the LHC
… con leptones de alto momento medidos en el detector CMS del LHC. Los estudios se realizan con datos correspondientes a colisiones protón-protón a √s=13
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Search for supersymmetric partners of the top quark with the CMS detector and novel top quark tagging algorithms.
… observation of the Higgs boson by the ATLAS and CMS experiments at the LHC. The astronomical observation of dark matter, among other reasons, motivates us to look for particles not part of the standard model. One extension of the model posits an additional symmetry which pairs every particle with …
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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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Electroweak physics and evidence for a Higgs boson decaying to a pair of tau leptons with the CMS detector
.Studies of the electroweak interactions using final states with leptons in proton-proton collisions at the Large Hadron Collider at [square root of] s = 7 TeV, [square root of] s = 8 TeV, and [square root of] s = 13 TeV center-of-mass energies are described. Measurements of total inclusive and …
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