Search for dissertations about: "beyond the Standard Model"

Showing result 21 - 25 of 102 swedish dissertations containing the words beyond the Standard Model.

  2. 21. Search for doubly charged Higgs bosons in multi-lepton final states with the ATLAS detector

    Author : Katja Mankinen; Partikel- och kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATLAS; Beyond the Standard Model; Doubly Charged Higgs; Left-right symmetry; LHC; Same-charge leptons; Taus; Transition radiation tracker; Fysicumarkivet A:2020:Mankinen;

    Abstract : Standard Model events with prompt, isolated, same-charge high-pT leptons are rare, and therefore events with such final states provide a powerful signature towards new discoveries. This thesis presents two searches for doubly charged Higgs bosons decaying into same-charge lepton pairs using proton–proton collision data recorded by the ATLAS detector at the LHC. READ MORE

  4. 22. The Beauty in Broken Symmetries : b-jet identification and searches for Supersymmetry, Dark Matter and multi-Higgs boson production with the ATLAS experiment

    Author : Laura Pereira Sánchez; Sara Strandberg; Olof Lundberg; Mauro Donegà; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATLAS; b-tagging; HH; mistag rate; BSM; Physics; fysik;

    Abstract : The Large Hadron Collider is the largest and most powerful accelerator in the world. Proton bunches are accelerated to 6.5 TeV inside the LHC ring in opposite directions and are then collided at four different points around the ring with an energy of 13 TeV. READ MORE

  5. 23. Search for Charginos and Sleptons in ATLAS and Identification of Pile-up with the Tile Calorimeter

    Author : Pawel Klimek; Christophe Clément; Barbro Åsman; Freya Blekman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATLAS experiment; particle physics; high energy physics; supersymmetry; SUSY; beyond standard model; chargino; neutralino; slepton; vector boson fusion; VBF; Tile calorimeter; TileCal; pile-up; quality factor; Large Hadron Collider; LHC; CERN; fysik; Physics;

    Abstract : The standard model of particle physics (SM) describes the elementary particles and their interactions. Supersymmetry (SUSY), a symmetry beyond those included in the standard model could resolve some of the SM shortcomings. It can provide a candidate for Dark Matter and a solution to the hierarchy problem. READ MORE

  6. 24. Search for Dark Matter in events with missing transverse momentum and a Higgs boson decaying into bottom quarks with the ATLAS detector

    Author : Eleni Skorda; Partikel- och kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATLAS; LHC; Beyond the Standard Model; RECAST; Missing transverse momentum; Higgs boson; Bottom quarks; Transition Radiation Tracker; Dark Matter; Fysicumarkivet A:2022:Skorda;

    Abstract : Many astrophysical observations indicate the existence Dark Matter, which is not predicted by the Standard Model (SM) of particle physics. Many theories beyond the Standard Model (BSM) predict new heavy particles called WIMPs (Weakly Interacting Massive Particles). READ MORE

  7. 25. Phenomenology of Charged Higgs Bosons and B-meson Decays

    Author : David Eriksson; Johan Rathsman; Gunnar Ingelman; Fabio Maltoni; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Supersymmetry; Beyond Standard Model; B-Physics; Charged Higgs Boson; LHC; QCD; Spin Correlations; CMSSM; NUHM; Elementary particle physics; Elementarpartikelfysik;

    Abstract : For more than 30 years the Standard Model has been the theoretical foundation for particle physics. The theory has been verified successfully by experimental tests. Its biggest shortcoming is the non-discovery of the Higgs boson,responsible for giving the other particles masses. READ MORE