Sökning: "Higgs boson"

Visar resultat 1 - 5 av 54 uppsatser innehållade orden Higgs boson.

  1. 1. Search for Higgs-like bosons through optimization of top-quark modelling

    Magister-uppsats, Lunds universitet/Partikelfysik; Lunds universitet/Fysiska institutionen

    Författare :Rafael Antonio Lopez; [2021]
    Nyckelord :ttbar; top quark modelling; BSM; 2HDM S; Higgs-like bosons; ATLAS; HWW; XSh; top estimation; top remodelling; Physics and Astronomy;

    Sammanfattning : Accurate estimations of background processes associated with top-quarks are vital to studies concerned with finding new physics at the Large Hadron Collider (LHC)at CERN. Search for Higgs-like bosons in the ATLAS experiment at LHC was performed by optimising the use of b-jet tagging algorithms and improving on tt backgroundmodelling. LÄS MER

  2. 2. Can Feebly Interacting Massive Particles (FIMP) constitute Dark Matter?

    Master-uppsats, KTH/Fysik

    Författare :Grandharva Appagere; [2021]
    Nyckelord :Dark Matter; Higgs¬portal; Freeze¬-in mechanism; FIMP; C-W Mechanism; Mörk materia; Higgsportal; frys-in-mekanism; FIMP; C-W mekanism;

    Sammanfattning : In this study, we investigate the feasibility of Feebly Interacting Massive particles (FIMP) as possible candidates to constitute the observed Dark Matter abundance in the universe. FIMPs are particles that couple very feebly with known particles in the Standard Model (SM). LÄS MER

  3. 3. Optimization of event selection and fake background estimation in a search for heavy scalars in dilepton final states with the ATLAS detector

    Magister-uppsats, Lunds universitet/Partikelfysik; Lunds universitet/Fysiska institutionen

    Författare :Marius Burman Ingeberg; [2021]
    Nyckelord :Physics; Particle physics; ATLAS; Standard Model; CERN; LHC; Higgs boson; Exotic Higgs Boson; Dilepton final states; Optimization; Physics and Astronomy;

    Sammanfattning : The discovery of the Higgs boson h in 2012 further confirmed the remarkable accuracy of the Standard Model (SM). Despite this, some compelling excesses in multi-lepton final states were recorded in both major runs of the Large Hadron Collider (LHC). LÄS MER

  4. 4. Quartic Higgs self-coupling at a 100 TeV pp collider

    Master-uppsats, Lunds universitet/Teoretisk partikelfysik

    Författare :Sebastian Grabowski; [2021]
    Nyckelord :Quartic Higgs self-coupling; Triple Higgs production; Future Circular Collider; FCC; MadGraph; MadAnalysis; Events selection; selection strategy; Physics and Astronomy;

    Sammanfattning : We present a parton-level phenomenological study of triple-Higgs production at leading order in proton-proton collisions at a center-of-mass energy of 100 TeV with an integrated luminosity of 30 ab^-1. This study aims to estimate the prospects for measuring the signal hhh production observable at the Future Circular Collider. LÄS MER

  5. 5. Di-Higgs Production in the Standard Model and Beyond

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Hanna Brännström; [2021]
    Nyckelord :ATLAS; CERN; Higgs; partikelfysik; di-Higgs;

    Sammanfattning : This thesis examines how the kinetic properties of pair-produced Higgs bosons depend on whether the process is mediated by particles in the Standard Model or a simplified supersymmetric model. The analysis is based on simulated data made using MadGraph. LÄS MER