Sökning: "axions"

Hittade 5 uppsatser innehållade ordet axions.

  1. 1. Computational simulations of the Axion Longitudinal Plasma HAloscope

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Tove Klaesson; [2022]
    Nyckelord :;

    Sammanfattning : The quantum chromodynamics axion is a very light hypothetical particle that may simultaneously solve the dark matter and the strong CP problem. Recently, a new type of haloscope that can detect the resonant conversion of axions to photons was suggested, The Axion Longitudinal Plasma HAloscope (ALPHA). LÄS MER

  3. 2. Complementarity of high energy and high intensity experiments for dark photon benchmarks

    Master-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Joshua Greaves; [2022]
    Nyckelord :Dark matter; LDMX; Dark photon; Complementarity; Snowmass; Relic density; Thermal relic; Relic abundance; Cross section; Constraints; Limits; Minimal models; Energy frontier; Intensity frontier; Madgraph; Madanalysis; Vector mediated; Physics and Astronomy;

    Sammanfattning : Physical phenomena that are unexplained by the Standard Model (SM) of particle physics, are the subject of the area of research known as physics Beyond the Standard Model (BSM). BSM physics contains many Dark Matter (DM) theories which have emerged; from particles such as axions, neutrinos, and Weakly Interacting Massive Particles (WIMPs), to primordial black holes and others. LÄS MER

  4. 3. Superradiant axion clouds and their interaction with astrophysical plasma

    Master-uppsats, KTH/Fysik

    Författare :Erik Engstedt; [2021]
    Nyckelord :axions; superradiance; black holes; black hole accretion; astrophysical plasma; axioner; strålningsförstärkning; svarta hål; svart hålansamling; astrofysikalisk plasma;

    Sammanfattning : Axions are one of the best-motivated particles beyond the standard model of particle physics and a promising candidate for dark matter. Through the superradiant instability, axions can extract a significant amount of rotational energy from spinning black holes resulting in dense axion clouds. LÄS MER

  5. 4. Cosmological probes of the early universe with Axions & Gravitational Waves

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Teoretisk fysik

    Författare :Nicklas Ramberg; [2019]
    Nyckelord :axions; early universe; dark matter; gravitational waves; modified cosmology; cosmic strings; axion; tidigt universum; mörk materia; gravitationsvågor; modifierad kosmologi; kosmiska strängar;

    Sammanfattning : This thesis uses theoretical studies, and numerical simulations to provide results of the experimental reach to detect the QCD axion as dark matter in a Non-standard cosmological background. Assuming that the QCD axion constitutes the full CDM abundance of the universe, this thesis elaborates on its potential detection from experimental setups for the mass window of the axion. LÄS MER

  7. 5. CP violation in QCD, axions and possible connections to dark matter

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Eric Corrigan; [2013]
    Nyckelord :QCD; axions; CP violation; dark matter; symmetry breaking; Physics and Astronomy;

    Sammanfattning : The strong CP problem and its solution are treated on the undergraduate level. We first review the theoretical background of symmetry and symmetry breaking in particle physics. The Goldstone model is treated for several simple systems: the linear sigma model, the Higgs mechanism and the interpretation of pions as pseudo-Goldstone bosons in QCD. LÄS MER