Sökning: "Fysik"

Visar resultat 1 - 5 av 4923 avhandlingar innehållade ordet Fysik.

  1. 1. On string integrability A journey through the two-dimensional hidden symmetries in the AdS/CFT dualities

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Valentina Giangreco Marotta Puletti; Uppsala universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; String Theory; AdS-CFT correspondence; Integrable Field theory; Sigma models; S-matrix; Factorized Scattering; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; NATURAL SCIENCES Physics Other physics Mathematical physics; NATURVETENSKAP Fysik Övrig fysik Matematisk fysik; Theoretical Physics; teoretisk fysik;

    Sammanfattning : One of the main topics in the modern String Theory are the conjectured string/gauge (AdS/CFT) dualities. Proving such conjectures is extremely difficult since the gauge and string theory perturbative regimes do not overlap. In this perspective, the discovery of infinitely many conserved charges, i.e. LÄS MER

  2. 2. Searches for Particle Dark Matter Dark stars, dark galaxies, dark halos and global supersymmetric fits

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Pat Scott; Stockholms universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; dark matter; supersymmetry; gamma rays; dwarf galaxies; stellar evolution; cosmological perturbations; phase transitions; statistical techniques; NATURAL SCIENCES Physics Elementary particle physics Astroparticle physics; NATURVETENSKAP Fysik Elementarpartikelfysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Astroparticle physics; NATURVETENSKAP Fysik Astronomi och astrofysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Cosmology; NATURVETENSKAP Fysik Astronomi och astrofysik Kosmologi; NATURAL SCIENCES Physics Elementary particle physics; NATURVETENSKAP Fysik Elementarpartikelfysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Formation and development of stars; NATURVETENSKAP Fysik Astronomi och astrofysik Stjärnors bildning och utveckling; NATURAL SCIENCES Physics Astronomy and astrophysics High energy astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik Högenergiastrofysik; teoretisk fysik; Theoretical Physics;

    Sammanfattning : The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I describe a number of complementary searches for particle dark matter. LÄS MER

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

    Detta är en avhandling från Stockholm : KTH

    Författare :Per Hansson; KTH.; [2008]
    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; NATURAL SCIENCES Physics Elementary particle physics; NATURVETENSKAP Fysik Elementarpartikelfysik; NATURAL SCIENCES Physics; NATURVETENSKAP 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

  4. 4. Search for Gamma-ray Lines from Dark Matter with the Fermi Large Area Telescope

    Detta är en avhandling från Stockholm : KTH

    Författare :Tomi Ylinen; KTH.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fermi; Large Area Telescope; gamma-rays; dark matter; spectral lines; beam test; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; NATURAL SCIENCES Physics Astronomy and astrophysics Astroparticle physics; NATURVETENSKAP Fysik Astronomi och astrofysik Astropartikelfysik;

    Sammanfattning : Dark matter (DM) constitutes one of the most intriguing but so far unresolved issues in physics. In many extensions of the Standard Model of particle physics, the existence of a stable Weakly Interacting Massive Particle (WIMP) is predicted. The WIMP is an excellent DM particle candidate. LÄS MER

  5. 5. Synchrotron radiation induced fluorescence spectroscopy of gas phase molecules

    Detta är en avhandling från Stockholm : Fysik

    Författare :Jesús Álvarez Ruiz; KTH.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; molecular spectroscopy; photon induced fluorescence; synchrotron radiation; superexcited states; Fysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : A new experimental set-up for gas phase fluorescence studies using synchrotron radiation has been designed and constructed to perform simultaneously total and dispersed fluorescence measurements.Neutral photodissociation of CO has been investigated after excitation with 19-26 eV photons. LÄS MER