Sökning: "Electroweak"

Visar resultat 6 - 10 av 25 avhandlingar innehållade ordet Electroweak.

  1. 6. Measurements of supersymmetry with the ATLAS experiment at the LHC

    Författare :Jesper Söderqvist; KTH; []
    Nyckelord :;

    Sammanfattning : If supersymmetry exists at the electroweak scale, then it should be possible to discover it at CERN's next accelerator, the Large Hadron Collider (LHC). The phenomenology predicted by the supergravity inspired mimmal supersymmetric standard model (SUGRA) is examined in detail. LÄS MER

  3. 7. Production asymmetry of strange quarks in electron-positron annihilation at LEP

    Författare :Maria Gunther Axelsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation sciences; Strålningsvetenskap; Radiation biology; Strålningsbiologi; högenergifysik; High Energy Physics;

    Sammanfattning : The forward-backward asymmetry in the production of strange quarks in electron-positron annihilation has been measured at a centre-of-mass energy corresponding to the mass of the Z0 particle. The asymmetry at this energy is highly sensitive to the ratio between the vector and axial-vector couplings of the quark to the Z0 and to the value of the electroweak mixing angle sin2 θw. LÄS MER

  4. 8. Dynamics of quarks and leptons : theoretical Studies of Baryons and Neutrinos

    Författare :Tommy Ohlsson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chiral quark model; baryons; conguration mixing; magnetic moments; Coleman{Glashow sum-rule; spin structure; spin polarizations; weak form factors; semileptonic decays; nucleon quark sea isospin asymmetry; neutrinos; neutrino oscillations; neutrino avors; mixing angles; mass squared dierences; MSW eect; numerical calculations; interpretation of experiments; Mathematical physics; Matematisk fysik;

    Sammanfattning : The Standard Model of Elementary Particle Physics (SM) is the present theoryfor the elementary particles and their interactions and is a well-established theorywithin the physics community. The SM is a combination of Quantum Chromodynamics(QCD) and the Glashow{Weinberg{Salam (GWS) electroweak model. LÄS MER

  5. 9. Studies of fermion masses in Gauge theories

    Författare :Bengt-Åke Lindholm; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning : The Electroweak Standard Model of particle physics has proved to be avery successful theory. Nevertheless several questions have been raised dueto shortcomings of the model. The most outstanding question in this modelconcerns the origin of masses of the elementary particles. Eventually wehope that a more fundamental theory will explain the masses. LÄS MER

  7. 10. Astrophysical and Collider Signatures of Extra Dimensions

    Författare :Henrik Melbéus; Tommy Ohlsson; Jörn Kersten; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Extra-dimensional quantum field theories; universal extra dimensions; Kaluza-Klein dark matter; Arkani-Hamed-Dimopoulos-Dvali model; hierarchy problem; neutrino mass; seesaw mechanism; Large Hadron Collider phenomenology; Elementary particle physics; Elementarpartikelfysik;

    Sammanfattning : In recent years, there has been a large interest in the subject of extra dimensions in particle physics. In particular, a number of models have been suggested which provide solutions to some of the problems with the current Standard Model of particle physics, and which could be tested in the next generation of high-energy experiments. LÄS MER