Sökning: "David Marsh"

Hittade 4 avhandlingar innehållade orden David Marsh.

1. 1. Reconstructing the Primordial Seeds of Cosmic Structures in Galaxy Surveys

   Författare :Adam Johansson Andrews; Jens Jasche; David Marsh; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

   Sammanfattning : One of the most outstanding questions in modern cosmology concerns the physical processes governing the primordial universe and the origin of cosmic structure. These primordial signals appear in a variety of cosmic large-scale structure probes, e.g. LÄS MER

3. 2. Why nothing matters : A tale of vacua in the early Universe

   Författare :Aliki Litsa; Katherine Freese; M. C. David Marsh; Marco Peloso; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inflation; reheating; Higgs; cosmological phase transitions; Theoretical Physics; teoretisk fysik;

   Sammanfattning : The paradigm of inflation –  a period of accelerated expansion in the very early Universe –  was introduced to give solutions to a number of problems encountered in Standard Big Bang cosmology. Additionally, due to its quantum nature, inflation is able to generate the necessary primordial inhomogeneity “seeds”, which eventually evolve into large-scale structures. LÄS MER

4. 3. Axionlike particles, quantum loops, and supernovae : The role of quantum loop corrections for astrophysical ALPs

   Författare :Eike Christoph Müller; David Marsh; Frank Wilczek; Bo Sundborg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik;

   Sammanfattning : In this thesis the quantum field theory and astrophysical phenomenology of axionlike particles (ALPs) are studied. The effective field theory of ALPs is reviewed with a special focus on quantum loops, the renormalization group equations, and the equivalent forms of the interaction between ALPs and fermions. LÄS MER

5. 4. Astrophysical probes of axionlike particles

   Författare :Eike Christoph Ravensburg; M. C. David Marsh; Frank Wilczek; Joerg Jaeckel; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astroparticle physics; axions; supernovae; physics beyond the standard model; dark matter; Theoretical Physics; teoretisk fysik;

   Sammanfattning : This thesis is a contribution to the search for new fundamental physics in the form of axionlike particles (ALPs). ALPs are relatively light and feebly interacting particles that are part of many theories extending the Standard Model of particle physics, e.g. LÄS MER