Essays about: "invariant"

Showing result 1 - 5 of 207 essays containing the word invariant.

1. 1. A temporal Hawkes process model for shooting occurrences in Sweden

   University essay from Lunds universitet/Statistiska institutionen

   Author : Sara Kopelman; [2024]
   Keywords : Point processes; stochastic processes; statistics; conditional intensity; crime; shootings; Mathematics and Statistics;

   Abstract : The Hawkes process, also referred to as a self-exciting point process, is a class of point processes where the intensity is conditioned on previous events. More specifically, an event occurrence excites the process, temporarily increasing the probability of more events occurring. READ MORE

3. 2. The Sustainable Era - The Excess Return on Swedish Sustainable Global Equity Funds

   University essay from Göteborgs universitet/Institutionen för nationalekonomi med statistik

   Author : Kristoffer Holmgren; Måns Hurtigh; [2023-07-03]
   Keywords : Fama-French; ESG; Morningstar; Morningstar Globe Rating; funds; global equity funds; sustainability; excess return;

   Abstract : This thesis explores the relationship between the performance of Swedish global equity funds and the level of sustainability, as measured by the Morningstar Globe Rating, using a Fama-French six-factor model, globe rating categories, and time effects. Treating the Morningstar Globe Rating as a time-invariant variable, a sample of 80 Swedish global equity funds are divided into two sustainability groups, ‘Low’ and ‘High’, grouping funds with 1-3 globes into a reference group. READ MORE

4. 3. Exploring electroweak symmetry breaking in the scale-invariant Two-Higgs-Doublet Model

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Erik Rustas; [2023]
   Keywords : Two-Higgs-Doublet Models; 2HDM; Scale-invariance; Baryogenesis; BSM; Baryon Asymmetry; Coleman-Weinberg Potential; Theoretical Particle Physics; Physics and Astronomy;

   Abstract : This thesis investigates the properties of a general scale-invariant Two-Higgs-Doublet Model and its phenomenological consequences with focus on the scalar sector. The concept suggests that introducing more CP-violation, both spontaneous and explicit, may make it possible to meet the Sakharov conditions and account for the Universe's baryon asymmetry. READ MORE

5. 4. Supersymmetry in Quantum Mechanics

   University essay from Uppsala universitet/Institutionen för materialvetenskap

   Author : Ludvig Chen; [2023]
   Keywords : Quantum Mechanics; Supersymmetry; Witten Index; Morse Theory;

   Abstract : The introduction of supersymmetry has led to great progress in the study of quantum field theories. Notably, with supersymmetry, properties of a quantum field theory can be computed with higher precision than what would otherwise be possible. In this project, we investigate supersymmetry in the context of quantum mechanics. READ MORE

6. 5. Constraining the Higgs width in Higgs production associated with a top quark pair

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Benjamin Dahlén; [2023]
   Keywords : Higgs; width; cross section; on-shell; off-shell; invariant mass; Standard model; upper bound; Physics and Astronomy;

   Abstract : In this thesis we study the width of the Higgs boson in the process pp → t ̄t 4l at LO using MadGraph5_aMC@NLO to generate the events. The contributions including the Higgs signal, continuum background and interference were considered in order to calculate the expected number of events in a broad range of four-lepton invariant masses. READ MORE