Sökning: "Elementary particle physics"

Visar resultat 16 - 20 av 91 avhandlingar innehållade orden Elementary particle physics.

1. 16. Top Quarks at the Tevatron : Measurements of the Top Quark Production and Decay with the D0 Experiment

   Författare :Jonas Strandberg; Barbro Åsman; Michael Albrow; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; elementary particle physics; D0; Tevatron; top quark; Physics; Fysik;

   Sammanfattning : This thesis presents two measurements of the top quark using 230 pb-1 of data taken with the D0 detector at the Tevatron accelerator. The first measurement determines the top pair production cross section at sqrt(s)=1.96 TeV in proton-antiproton collisions. LÄS MER

3. 17. A Dark Matter Search with AMANDA : Limits on the Muon Flux from Neutralino Annihilations at the Centre of the Earth with 1997-99 Data

   Författare :Patrik Ekström; Per Olof Hulth; Lee Thompson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Elementary particle physics; Elementarpartikelfysik;

   Sammanfattning : The nature of the dark matter in the Universe is one of the greatest mysteries in modern astronomy. The neutralino is a nonbaryonic dark matter candidate in minimal supersymmetric extensions to the standard model of particle physics. LÄS MER

4. 18. Top-Quark and Charged Higgs Boson Production at Hadron Colliders : Data Analysis at the DØ Experiment and Simulations for the ATLAS Detector

   Författare :Nils Gollub; Tord Ekelöf; Richard Brenner; Patrizia Azzi; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Elementary particle physics; ATLAS; LHC; charged Higgs boson; MSSM; D0; Tevatron; top quark; elementary particle physics; Elementarpartikelfysik; Elementary particle physics; Elementarpartikelfysik;

   Sammanfattning : This thesis treats two different projects, both aiming at experimental tests at hadron colliders of some specific predictions of the Standard Model (SM) of particle physics and of its Minimal Supersymmetric extension (MSSM). The thesis is based on four papers. LÄS MER

5. 19. Serch for Neutralino Dark Matter with the AMANDA-II Neutrino Telescope

   Författare :Yulia Minaeva; Per Olof Hulth; John Carr; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Elementary particle physics; Elementarpartikelfysik;

   Sammanfattning : The annihilation of weakly interacting massive particles (WIMPs), accumulated in gravitational potentials (e.g., the core of the Earth, the Sun or the Galactic halo) would lead to neutrino production. LÄS MER

7. 20. Search for Supersymmetry with DELPHI, and preparation for ATLAS

   Författare :Per Johansson; Kerstin Jon-And; Klas Hultqvist; Anna Lipniacka; Ritva Kinnunen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supersymmetry; particle physics; Elementary particle physics; Elementarpartikelfysik;

   Sammanfattning : This thesis reports on searches for supersymmetric particles, in particular neutralinos, conducted with the DELPHI detector at the LEP accelerator at CERN. The searches were performed within the framework of the Minimal Supersymmetric Standard Model (MSSM), with R-parity conserved and gravity mediated supersymmetry breaking. LÄS MER