Essays about: "Gauge theory"
Showing result 1 - 5 of 62 essays containing the words Gauge theory.
-
1. Z2-Gauge Theory with Matter : Dispersive behaviour of a dimer in a 1+1-dimensional lattice
University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)Abstract : The intention with this thesis is to investigate a dimer in a spin chain. Inorder to do that, a model from Z2-gauge theory is taken as the theoretical motivation to construct a discrete lattice with Ising spin properties. A dimer is then allowed to exist indirectly in the empty space between sites. READ MORE
-
2. Phenomenological exploration of flavored Grand Unification through high-scale matching and renormalization group flow
University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisationAbstract : The phenomenological success of the Standard Model (SM), and its unification of the electromagnetic and weak forces has inspired the search for a Grand Unified Theory (GUT), that dynamically reduces to the SM at low energies. In this work, we consider one such GUT, based on the trinification model [SU(3)]³ with an additional local SU(2) family symmetry, that is then broken directly to the gauge symmetry group of the SM. READ MORE
-
3. Asymptotic Symmetries and Dressed States in QED and QCD
University essay from Stockholms universitet/FysikumAbstract : 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
-
4. Scattering of Charge Carriers in 2+1-Dimensional Quantum Field Theory
University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)Abstract : The aim of this thesis is to examine the hard $S$-matrix for QED and QCD, due to Hannesdottir and Schwartz [1], both recreating known results, and finding new results in lower dimensions. Electrons by themselves are not gauge invariant, and in the massless limit do not give finite $S$-matrix elements for individual processes; one needs to add together seemingly arbitrary combinations of diagrams in order to be able to calculate the scattering cross-section. READ MORE
-
5. Ageing Populations and World Trade: Blight or Blessing?
University essay from Lunds universitet/Ekonomisk-historiska institutionenAbstract : Since the last half of the twentieth century, population ageing has increasingly become a problem for countries all over the world. The literature on population ageing is very well- established, however, it is lacking in one significant respect. That is, hardly any research has been done on how population ageing may affect international trade. READ MORE
