The Faculty of Mathematics and Natural Sciences: Browsing Mathematisch-Naturwissenschaftliche Fakultät by Title
Now showing items 2300-2319 of 4323
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Measurement of Tau Polarisation in Z/γ* → ττ Decays in Proton–Proton Collisions at ATLAS
Winter, Benedict Tobias (2019-12-19)This thesis presents a measurement of the tau polarisation in Z/gamma*->tautau decays at ATLAS using a dataset of proton–proton collisions recorded at a centre-of-mass energy of sqrt(s) = 8 TeV that amounts to an integrated ... -
Measurement of the γn→K0Σ0 photoproduction at the BGOOD experiment and the relation to possible pentaquark states
Kohl, Katrin (2022-04-08)Hadrons are particles consisting of quarks bound by the strong force. Ground states and lower lying excitations can be described successfully as mesons consisting of quark-antiquark pairs and baryons consisting of three ... -
Measurement of the Associated Production of a Single Top Quark and a W Boson in Single-Lepton Events with the ATLAS Detector
Mergelmeyer, Sebastian (2016-06-10)The production of a single top quark in association with a W boson (Wt) is measured with the ATLAS detector using proton-proton collision events with one lepton, three jets and missing transverse energy at √s = 8 TeV. ... -
Measurement of the beam and helicity asymmetries in the reactions γp → pπ0 and γp → pη
Afzal, Farah Noreen (2019-09-24)Nucleons are bound states composed of quarks and gluons. The study of the nucleon excitation spectra gives insight into the underlying dynamics between quarks and gluons that are governed by the strong interactions and ... -
Measurement of the double polarization observables G and E in neutral and positive pion photoproduction off the proton
Spieker, Karsten Philipp (2020-08-14)The nucleons, as one of the most fundamental building blocks of visible matter, are built up of quarks and gluons. However, the interactions and dynamics inside the nucleons, which are mediated by the strong force and ... -
Measurement of the Higgs Boson Decay to τ-Pairs in the Lepton plus Hadrons Final State in Proton-Proton Collisions with the ATLAS Detector
Liebal, Jessica Kristina (2016-11-28)In this thesis, the decay of the Standard Model Higgs boson into one hadronically and one leptonically decaying τ lepton is investigated using multivariate methods. Proton-proton collisions recorded by the ATLAS experiment ... -
Measurement of the inclusive Z + bb cross section in pp-collisions at 7 TeV with ATLAS
Hellmich, Dennis (2014-09-05)In this thesis, the measurement of the inclusive cross section of the production of two b-jets in association with a Z boson is measured where the Z can decay to an electron-positron pair or to a muon-antimuon pair. The ... -
Measurement of the Proton Structure from high-Q2 Neutral Current Events in e+p Deep Inelastic Scatering at HERA
Schnurbusch, Henning (2002)Inclusive Neutral Current cross sections in e+p deep inelastic scattering yielding the generalised structure function F2 have been measured in the regime of Q2 >185 GeV2. The ... -
Measurement of the Strangeness Spectral Function and the Mass of the Strange Quark in Hadronic τ Decays with the Opal Detector
Mader, Wolfgang Franz (2004)Tau lepton decays with open strangeness in the final state are measured with the OPAL detector at LEP to determine the strange hadronic spectral function of the t lepton and the mass of the strange quark. The decays ... -
Measurement of the top quark decay branching fraction ratio Rb = B(t → Wb)/B(t → Wq) and of the inclusive production cross section pp → tt in the dilepton channel at ATLAS
Leyko, Agnieszka (2022-01-13)The top quark branching fraction ratio Rb and the inclusive production cross section σ tt̄ are measured in the dilepton channel using 4.6 fb-1 of proton-proton collisions at the centre-of-mass ... -
Measurement of the Top Quark Mass using Dilepton Events and a Neutrino Weighting Algorithm with the DØ Experiment at the Tevatron (Run II)
Meyer, Jörg (2007)Several measurements of the top quark mass in the dilepton final states with the D0 experiment are presented. The theoretical and experimental properties of the top quark are described together with a brief introduction ... -
Measurement of the top quark pair production cross section with the ATLAS detector at LHC in pp collisions at √s =7 TeV in dilepton final states
Abajyan, Tatevik (2012-06-04)The production cross section of top quark pairs in proton-proton collisions at center-of-mass energy of 7 TeV recorded with the ATLAS detector at the CERN Large Hadron Collider is measured. The goal of the analysis is to ... -
Measurement of the top-quark mass and the ttZ cross section in ATLAS: the tt dilepton way
Yau Wong, Kaven Henry (2015-07-07)A measurement of the top-quark mass and the ttZ cross section is performed using 4.6 fb-1 and 20.3 fb-1 of data from proton-proton collisions collected ... -
Measurement of the transverse momentum distribution of Z bosons in proton-proton collisions at √s = 7TeV using the ATLAS detector
Müller, Karl Klemens (2013-09-25)Z boson production at the LHC presents a good opportunity to test Standard Model predictions. This thesis reports the measurement of the Z boson transverse momentum distribution in proton-proton collisions at sqrt(s)=7TeV, ... -
Measurement of the Weak Mixing Angle and the Spin of the Gluon from Angular Distributions in the Reaction pp → Z/γ* + X → μ+μ- + X with ATLAS
Schmieden, Kristof (2013-11-15)The measurement of the effective weak mixing angle with the ATLAS experiment at the LHC is presented. It is extracted from the forward--backward asymmetry in the polar angle distribution of the muons originating from $Z$ ... -
Measurement of Transverse Momentum Dependent Asymmetries with COMPASS Experiment at CERN
Venugopal, Girisan (2008)The COMPASS experiment, which started running at the European Council for Nuclear Research, CERN, in Geneva in 2001, is currently investigating in a wide ranging programme the spin structure of the nucleon through ... -
Measurements of q2 moments of inclusive B → Xcℓν decays toward an alternative determination of |Vcb|
van Tonder, Raynette (2021-12-06)This thesis presents the first measurement of the first to the fourth moments of the four-momentum transfer squared q2 spectrum for inclusive B → Xcℓν decays, where ℓ = ... -
Measurements of differential t-channel single top-quark production cross-sections in proton–proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector
Seema-Mergelmeyer, Pienpen (2018-03-28)Proton-proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector in 2012, corresponding to an integrated luminosity of 20.2 fb-1, are used to measure absolute and normalised ... -
Measurements of the mass and width of the W-boson, and test of lepton universality in W-boson decays with the ATLAS detector
König, Philipp Thomas (2023-04-20)The Standard Model of particle physics serves as the predominant theory of the microscopic world for many decades. Many discoveries have been predicted by this model and it still provides a good fit for a wide variety of ... -
Measurements of the Top Quark Pair Production Cross Section in Lepton+Jets Final States using a Topological Multivariate Technique as well as Lifetime b-Tagging in Proton-Antiproton Collisions at √s=1.96 TeV with the D0 Detector at the Tevatron
Golling, Tobias (2005)Two alternative measurements of the ttbar production cross section at √s = 1.96 TeV in proton-antiproton collisions in the lepton+jets channel are presented. The ttbar production cross section is extracted by combining the ...