Search for dissertations about: "Matrix Element Merging"

Found 4 swedish dissertations containing the words Matrix Element Merging.

  2. 1. Merging Parton Showers and Matrix Elements

    Author : Nils Lavesson; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Parton Model; QCD Phenomenology; Phenomenological Models; QCD; Jets;

    Abstract : This thesis considers models for describing high energy particle collisions. Existing phenomonological models are modified and new implementations made in order to achive a better description of states with several hard jets. To predict final state hadrons, parton showers are used together with pheonomenological hadronization models. READ MORE

  4. 2. Improving Parton Showers with Fixed Order Matrix Elements

    Author : Stefan Prestel; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Matrix Element Merging; Parton Shower; QCD; Phenomenology; Fysicumarkivet A:2013:Prestel;

    Abstract : This thesis considers numerical simulations of high energy particle collisions, and improvements in the description of multiple collimated jets of hadrons in collision events in particular. In the event simulation software called event generators, the structure of multi-jet events is determined through an interplay of the input calculation, parton showers and phenomenological hadronisation models. READ MORE

  5. 3. Tackling the Uncertainties of Event Generators

    Author : Leif Gellersen; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; QCD; Phenomenology; Parton Showers; Matrix Element Merging; Tuning;

    Abstract : This thesis is composed of four papers, which concern Monte Carlo event generators for high energy particle physics. Precise predictions of the outcome of particle collisions are important for the exploration of the Standard Model of particle physics at collider experiments like the LHC at CERN. READ MORE

  6. 4. High Order Cut Finite Element Methods for Wave Equations

    Author : Simon Sticko; Gunilla Kreiss; Mats G. Larson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cut finite element; Wave equation; Immersed; Fictitious domain; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Abstract : This thesis considers wave propagation problems solved using finite element methods where a boundary or interface of the domain is not aligned with the computational mesh. Such methods are usually referred to as cut or immersed methods. READ MORE