Sökning: "decay constants"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden decay constants.

  1. 1. Meson Properties in Partially Quenched Effective Field Theory

    Författare :Niclas Danielsson; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; statistical physics; gravitation; relativity; quantum mechanics; classical mechanics; Mathematical and general theoretical physics; Fysik; Chiral Perturbation Theory; masses; decay constants; Physics; electromagnetic interactions; Strong interactions; pseudoscalar mesons; thermodynamics; Matematisk och allmän teoretisk fysik; klassisk mekanik; kvantmekanik; relativitet; statistisk fysik; termodynamik;

    Sammanfattning : Mass corrections and decay constants for light mesons have been calculated in Partially Quenched Chiral Perturbation Theory. The calculations of the charged meson masses have been performed to third order, first for degenerate quark masses, and then, in a second project, for the general case. LÄS MER

  3. 2. Meson Decay with Isospin Breaking At Two Loops

    Författare :Karim Ghorbani; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kvantfältteori; Elementarpartikelfysik; quantum field theory; Elementary particle physics; Naturvetenskap; Natural science; hadron physics; standard model; chiral Lagrangian; quantum correction;

    Sammanfattning : In all calculations done in this thesis, the evaluation of higher order quantum corrections has been central. In the first paper included in this thesis we have investigated the effects of finite volume meson propagators for quark-antiquark vacuum expectation value at two-loop level. LÄS MER

  4. 3. Feasibility study of resonant antiproton capture by ions and an open system approach to resonance decay

    Författare :Michael Genkin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic physics; Atomfysik;

    Sammanfattning : The present thesis is based on two different projects. The first part deals withresonant capture of antiprotons by electron excitation in highly charged hydrogenlike ions. LÄS MER

  5. 4. Probing the Standard Model Higgs boson in the WW decay mode with the ATLAS detector at the LHC

    Författare :Jelena Jovicevic; Bengt Lund-Jensen; Rickard Enberg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis is concerns an analysis to probe the Higgs boson in the H→WW(*)→lvlv decay mode, one of three analyses contributing to the discovery of the Higgs boson at a mass of mH = 125 GeV in July 2012. The dataset used are the proton-proton collisions collected with the ATLAS detector at the CERN Large Hadron Collider during 2012 at a centre of mass energy of 8 TeV, and correspond to a total integrated luminosity of 13. LÄS MER

  7. 5. Theoretical Studies of Hadronic Reactions with Vector Mesons

    Författare :Carla Terschlüsen; Stefan Leupold; Stefan Scherer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hadron physics; Vector mesons; Effective field theories; Chiral Lagrangian; Meson-meson interactionss; Physics with specialization in Nuclear Physics; Fysik med inriktning mot kärnfysik;

    Sammanfattning : Aiming at a systematic inclusion of pseudoscalar and vector mesons as active degrees of freedom in an effective Lagrangian, studies have been performed in this thesis concerning the foundations of such an effective Lagrangian as well as tree-level and beyond-tree-level calculations. Hereby, vector mesons are described by antisymmetric tensor fields. LÄS MER