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primary topic: Effects of the Quantum Vacuum in Particle Physics and Cosmology

Effects of the Quantum Vacuum in Particle Physics and Cosmology
type: Article
abstract: In this work we investigate numerous effects of virtual particles on processes relevant for particle physics and cosmology. A central question is, whether radiative spontaneous electroweak symmetry breaking can be combined with neutrino mass generation, we find that the answer is affirmative. We discuss the implication of the RSSB on the neutrino mass phenomenology and low-energy observables. Furthermore, by comparing the models to experimental data we find that several anomalies in the present observations favour particular scenarios over the pure Standard Model hypothesis. We are able to show, that the presence of sterile neutrinos with active-sterile mixing of order $10^{-3}$ and masses in the TeV range leads to a reduced invisible decay width of the Z-boson and can bring the NuTeV observations in agreement with theoretical expectations. The models we discuss naturally incorporate long lived particles which can serve as dark matter candidates and we investigate this phenomenologically. We find that the combination of the requirements leads to interesting constraints on the model and parameter space. We find that loop induced electromagnetic moments for the neutral dark matter candidates, lead to interactions with charged particles. We use this and derive new constraints from existing XENON100 and LUX data. In addition we will study how vacuum effects can backreact on a given geometry in electromagnetism and semiclassical gravity. We find that in the case of gravity the conformal set up plays a special role and indicate several ideas for further investigation of this topic.
date: 2014
author list: authors
type: EPrint
type: DoctoralThesisEPrint
is part of: repository
has document: Effects of the Quantum Vacuum in Particle Physics and Cosmology (PDF)
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subject: 530 Physik

Effects of the Quantum Vacuum in Particle Physics and Cosmology (PDF)
type: Document
has file: JuriSmirnovThesis.pdf
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Juri Smirnov
type: Person
given name: Juri
family name: Smirnov

Effects of the Quantum Vacuum in Particle Physics and Cosmology (Other)
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Effects of the Quantum Vacuum in Particle Physics and Cosmology (Other)
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Effects of the Quantum Vacuum in Particle Physics and Cosmology (Other)
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Effects of the Quantum Vacuum in Particle Physics and Cosmology (Other)
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Effects of the Quantum Vacuum in Particle Physics and Cosmology (Other)
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primary topic: Effects of the Quantum Vacuum in Particle Physics and Cosmology

530 Physik
type: Concept
preferred label: 530 Physics @en