Essays about: "Higgs"

Showing result 1 - 5 of 67 essays containing the word Higgs.

  1. 1. Construction of the Higgs Mechanism and the Lee-Quigg-Thacker-bound

    University essay from Uppsala universitet/Högenergifysik

    Author : Franz Wilhelm; [2019]
    Keywords : higgs mechanism; higgs; LQT; LQT-bound; spontaneous symmetry breaking; symmetry breaking; electroweak sector; higgs mass;

    Abstract : In this paper the higgs mechanism for the standard model is constructed in steps. First by considering spontaneous breaking of discrete and continuous global gauge invariance. Then spontaneous breaking of local gauge invariance. READ MORE

  2. 2. PARTON SHOWER UNCERTAINTIES ON THE TOP MASS

    University essay from Lunds universitet/Teoretisk partikelfysik

    Author : Hristina Georgieva Hristova; [2019]
    Keywords : top quark mass; uncertainty; Lund Monte Carlo; Pythia; Physics and Astronomy;

    Abstract : The non-Abelian QCD nature allows for pp collisions to contain gluon emissions off quarks as well as gluon branchings into further gluons — a structure that can be described by the parton shower model. In this project we present the results of the impact the shower has on the reconstruction of the W-boson and top quark masses using Pythia, the Lund Monte Carlo event generator. READ MORE

  3. 3. Derivation of a transfer function to estimate the Z(vv)+jets background from photon+jets in a search for dark matter at the ATLAS detector

    University essay from Lunds universitet/Partikelfysik; Lunds universitet/Fysiska institutionen

    Author : Emelie Olsson; [2019]
    Keywords : Physics and Astronomy;

    Abstract : It has for long been known that dark matter must exist in our universe. Despite massive efforts to detect dark matter, its constituents remain a mystery. One strategy to unveil this mystery is to produce dark matter by colliding Standard Model particles. READ MORE

  4. 4. Phenomenology of a Three Higgs Doublet Model with a U(1)xZ2 flavour symmetry

    University essay from Lunds universitet/Teoretisk partikelfysik

    Author : Ian Padilla; [2019]
    Keywords : Phenomenology Physics Beyond the Standard Model Three Higgs Doublet Model Flavour Symmetry; Physics and Astronomy;

    Abstract : We have studied the main features and the phenomenological consistency of a family-nonuniversal Three Higgs Doublet Model (3HDM) with a softly broken U(1)xZ2 family symmetry that enforces the flavour hierarchies in the Standard Model (SM) while implementing a tree-level Flavour Changing Neutral Current (FCNC) suppression in a Branco-Grimus-Lavoura way. Furthermore, the alignment limit is imposed in the scalar sector to enforce the physical scalar spectrum to accommodate a SM-like Higgs boson. READ MORE

  5. 5. Renormalization Group Evolution Analysis of the Gauged Froggatt-Nielsen Mechanism in 2-Higgs-doublet Models

    University essay from Lunds universitet/Teoretisk partikelfysik; Lunds universitet/Institutionen för astronomi och teoretisk fysik

    Author : Robin Plantey; [2019]
    Keywords : Physics and Astronomy;

    Abstract : In this thesis, we consider a 2-Higgs-doublet model with a gauged Froggatt-Nielsen mechanism as an extension of the standard model. We assume that (i) the theory at the electroweak scale is the low energy limit of a theory defined at a scale $\Lambda_{FN}$ (ii) the Yukawa couplings at $\Lambda_{FN}$ are generated by the Froggatt-Nielsen mechanism. READ MORE