Sökning: "dark photon"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden dark photon.

  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. Dark matter electron interactions in detector materials

    Författare :Einar Urdshals; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dark matter; effective theory; direct detection;

    Sammanfattning : Dark Matter (DM) makes up 85% of the matter content of the universe, and its gravitational effects are seen on scales ranging from that of cosmology to that of galactic astrophysics. The nature of DM is, however, unknown. Studying DM in the lab is key to understanding its nature. LÄS MER

  4. 3. Dark matter electron interactions in detector materials

    Författare :Einar Urdshals; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; effective theory; Dark matter; direct detection;

    Sammanfattning : Dark Matter (DM) makes up 85% of the matter content of the universe, and its gravitational effects are seen on scales ranging from that of cosmology to that of galactic astrophysics. The nature of DM is, however, unknown. LÄS MER

  5. 4. Out of the Dark and into the Light - Microscopic Analysis of Bright, Dark and Trapped Excitons

    Författare :Maja Feierabend; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; density matrix formalism; localized states; impurities; dark excitons; strain; transition metal dichalcogenides; Bloch equations;

    Sammanfattning : Atomically thin transition metal dichalcogenides (TMDs) have been in the focus of current research due to their efficient light-matter interaction, as well as the remarkably strong Coulomb interaction that leads to tightly bound excitons. Due to their unique band structure, TMDs show a variety of optically accessible bright and inaccessible dark excitons. LÄS MER

  7. 5. Color Screening in QCD and Neutrinos from Singlino Dark Matter

    Författare :Dominik Werder; Gunnar Ingelman; Rikard Enberg; Roman Pasechnik; Hannes Jung; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; QCD; Diffraction; SCI; Dark Matter; Singlino; NMSSM; Indirect Detection; Fysik med inriktning mot elementarpartikelfysik; Physics with specialization in Elementary Particle Physics;

    Sammanfattning : Hard diffraction in proton collisions, where the initial state proton emerges from the interaction rather undisturbed despite a hard interaction scale, has been studied for a few decades. First observed in proton-proton collisions, the phenomenon is seen as well in deep inelastic electron-proton scattering (DIS) as a leading final state proton and a rapidity gap-region without final state particles. LÄS MER