Sökning: "U boson"

Hittade 4 avhandlingar innehållade orden U boson.

  1. 1. Search for a new light boson in meson decays

    Författare :Damian Pszczel; Andrzej Kupść; Michel Garcon; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; dark matter; dark vector boson; dark photon; U boson; meson decays; form factor; Dalitz decay; eta meson; Fysik med inriktning mot elementarpartikelfysik; Physics with specialization in Elementary Particle Physics;

    Sammanfattning : The subject of the presented work lies in the field of experimental particle physics. The main topic is the study of e+ e− pairs from η meson decays. The data sample used in this work was collected by the WASA-at-COSY collaboration in proton-proton collisions at 1.4 GeV kinetic beam energy. LÄS MER

  3. 2. Structure formation, phase transitions and drag interactions in multicomponent superconductors and superfluids

    Författare :Karl Sellin; Egor Babaev; Anatoly Kuklov; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics;

    Sammanfattning : Superconductivity and superfluidity are some of the most funda-mental and important phenomena of modern physics. However, muchtheoretical work for such systems so far has been restricted to the one-component case. LÄS MER

  4. 3. Family symmetries and radiative corrections in multi-scalar extensions of the Standard Model

    Författare :Jonas Wessén; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Beyond the Standard Model; Trinification; Grand Unification; Three Higgs doublet models; Coleman-Weinberg potential; Supersymmetry; Left-Right symmetry; Fysicumarkivet A:2018:Wessén;

    Sammanfattning : The four articles contained in this thesis all concern aspects of model building beyond the Standard Model (BSM). While Paper I mainly serves as a ``tool paper'' in which the results can be used to simplify certain calculations of one-loop effects from new heavy particles, Paper II--IV all deal with consequences of family symmetries in several BSM scenarios. LÄS MER

  5. 4. Theory of Electron Transport in Superconducting Heterostructures

    Författare :Magnus Hurd; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis deals theoretically with electron transport in superconducting heterostructures. Depending on the system I use different theoretical approaches. The thesis contains an introduction followed by four research papers (Papers I-IV). The introduction gives the background of the work in Papers I-IV. LÄS MER