Sökning: "QUARK"

Visar resultat 6 - 10 av 79 avhandlingar innehållade ordet QUARK.

  1. 6. First Determination of the Electric Charge of the Top Quark and Studies of the Top Quark Pair Background to New Physics

    Författare :Per Hansson; Bengt Lund-Jensen; Jorgen D'Hondt; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; experimental particle physics; particle physics; standard model tests; dzero; fermilab; tevatron; top quark; top physics; electric charge; atlas; cern; lhc; large hadron collider; supersymmetry; Elementary particle physics; Elementarpartikelfysik; Physics; Fysik;

    Sammanfattning : This thesis is concerned with experimental investigations of properties of the top quark and processes involving this particle. In the first part of the thesis, the first determination of the electric charge of the top quark is presented. LÄS MER

  3. 7. Properties of baryons in the chiral quark model

    Författare :Tommy Ohlsson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chiral quark model; baryons; configuration mixing; magnetic moments; Coleman-Glashow sum-rule; spin polarizations; weak form factors; semilepronic decays; Physics; Fysik;

    Sammanfattning : In this thesis, several properties of baryons are studied using the chiral quark model. The chiral quark model is a theory which can be used to describe low energy phenomena of baryons. In Paper 1, the chiral quark model is studied using wave functions with configuration mixing. LÄS MER

  4. 8. Top Quarks at the Tevatron : Measurements of the Top Quark Production and Decay with the D0 Experiment

    Författare :Jonas Strandberg; Barbro Åsman; Michael Albrow; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; elementary particle physics; D0; Tevatron; top quark; Physics; Fysik;

    Sammanfattning : This thesis presents two measurements of the top quark using 230 pb-1 of data taken with the D0 detector at the Tevatron accelerator. The first measurement determines the top pair production cross section at sqrt(s)=1.96 TeV in proton-antiproton collisions. LÄS MER

  5. 9. Quark properties from deep inelastic muon scattering

    Författare :Allan Arvidsson; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  7. 10. First determination of the electric charge of the top quark

    Författare :Per Hansson; Bengt Lund-Jensen; Peter Hansen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Sammanfattning : In this thesis, the first determination of the electric charge of the top quark is presented using 370pb-1 of data recorded by the DØ detector at the Fermilab Tevatron accelerator. ttbar events are selected with one isolated electron or muon and at least four jets out of which two are b-tagged by reconstruction of a secondary decay vertex (SVT). LÄS MER