Essays about: "non abelian gauge theories"

Showing result 1 - 5 of 6 essays containing the words non abelian gauge theories.

  1. 1. Asymptotic Symmetries and Dressed States in QED and QCD

    University essay from Stockholms universitet/Fysikum

    Author : Saimeng Zhou; [2023]
    Keywords : Dressed states; Large gauge transformation; Faddeev-Kulish formalism; Generalized coherent state operator; Wilson line; Infrared divergence; Asymptotic Hamiltonian; QED; QCD;

    Abstract : Infrared divergences arising in theories with massless gauge bosons have been shown to cancel in scattering amplitudes when using dressed states constructed from the Faddeev- Kulish approach to the asymptotic states. It has been established that these states are closely related to asymptotic symmetries of the theory, that is, non-vanishing gauge trans- formations at the asymptotic boundary. READ MORE

  3. 2. Gribov ambiguities in non-Abelian gauge theories

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Fredrik Granström; [2021]
    Keywords : Physics and Astronomy;

    Abstract : This thesis investigates the quantization of field theories using the functional integral formalism. Gauge invariance necessitates a gauge-fixing procedure that chooses a unique field configuration from each gauge orbit. READ MORE

  4. 3. Generalized Abelian Gauge Theory & Generalized Global Symmetry

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Emil Hössjer; [2020]
    Keywords : Differential characters; Wilson lines; generalized global symmetry; BF theory; Maxwell theory; spontaneous symmetry breaking; intersection number; selection rules; Noether theorem; sphere bundle; t Hooft operator;

    Abstract : We study Cheeger-Simons differential characters in order to define higher form U(1) gauge fields and their Wilson lines. We then go on to define generalized global symmetries. This is a topological formulation of symmetries which has interesting consequences when the charged operators extend through space. READ MORE

  5. 4. QFT and Spontaneous Symmetry Breaking

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Sheila Chauwinoir; [2020]
    Keywords : quantum field theory; abelian and non-abelian gauge theories; quantum electrodynamics; quantum chromodynamics; electroweak interaction; spontaneous symmetry breaking; higgs mechanism;

    Abstract : The aim of this project is to understand the structure of the Standard Model of the particle physics. Therefore quantum field theories (QFT) are studied in the both cases of abelian and non-abelian gauge theories i.e. quantum electrodynamics (QED), quantum chromodynamics (QCD) and electroweak interaction are reviewed. READ MORE

  6. 5. Calculating the Mass of Magnetic Monopoles in Non-Abelian Gauge Theories

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Måns Holmberg; [2016]
    Keywords : Magnetic monopole; Mass; Gauge theory; Non-Abelian group; Dirac monopole; t Hooft-Polyakov monopole; Georgi-Glashow model; Dyon; BPS-limit; Numerical calculation;

    Abstract : .... READ MORE