Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 351 for “"Dark Matter"”.
-
Galactic Dark Matter
… distribution and properties of Galactic dark matter necessary for its direct and indirect detection are currently unknown. Since the distributions of normal and dark matter in the Milky Way are coupled to each other as they both move in the same gravitational potential, constraints on the …
-
Dark matter dynamics
… have revealed a wealth of information about dark matter halos but their results are largely empirical. Here we attempt to shed light on simulation results by using a combination of analytic and numerical methods. First we generalize an analytic model of halo formation, known as Secondary …
-
Dark Matter Detection with the Dark Matter Time Projection Chamber Collaboration
<p>Evidence from many sources suggests that dark matter (matter that does not interact electromagnetically) accounts for a significant fraction of the mass density of the universe. The fact that dark matter has yet to be observed directly is one of the biggest outstanding problems in modern …
-
Hot and dark matter
… media, and we propose two new reactions for dark matter in the early universe. In the first part, we analyze the transverse momentum broadening in the absence of radiation of an energetic parton propagating through quark-gluon plasma via Soft Collinear Effective Theory (SCET). We show that …
-
Dark Matter in Spiral Galaxies
… studied with the aim to quantify the luminous-to-dark matter ratio inside their optical radii. In order to meet this goal, the galaxies' morphology and gas kinematics have been observed and compared to hydrodynamic gas simulations which were performed to predict the gas dynamics arising in …
-
Decaying dark matter and reionization
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1993
-
Antisymmetric tensor portals to dark matter
In the age of modern physics, dark matter is one of the primary unsolved problems from which the failures of our current understanding are laid bare. Since the 1970s, a growing body of evidence has been collected supporting the idea that there is a new form of elementary matter that is …
-
Dark matter phenomenology and model-building
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
-
CRESST Dark Matter Search with Cryogenic Calorimeters
Das CRESST Experiment im Gran Sasso Untergrundlabor sucht nach Dunkler Materie in Form von schwach wechselwirkenden massiven Teilchen (WIMPs) ueber elastische Streuung an Kernen. Die erste Phase von CRESST benutzte 262 g Saphir Kristalle als Absorber. Ein niedriger Untergrund, eine …
-
Dark Matter Production after Inflation and Constraints
… has accumulated in support of the existence of dark matter in our Universe. There are already plenty of dark matter candidates. However, we do not know yet whether any of these candidates constitutes the whole or a part of the dark matter population despite the tremendous experimental efforts. …
-
On effective field theory of dark matter
We investigate the feasibility of dark matter particles existing in the Universe as a spin-$\frac{1}{2}$ fermion using effective field theories to parametrise the higher order physics. Our goal is to determine the requirements for exclusion of such particles by direct and indirect detection. In …
-
Understanding dark matter halos with tidal caustics
… gamma-ray signal from self-interactions in the dark matter component, for likely particle models of dark matter. We find that the expected signal is an order of magnitude too low to be detected with current instruments. We also study the constraints that can be placed on the properties of the …
-
Dark matter dynamics in the early universe
We study a new form of dark matter interaction which may significantly affect the thermal relic abundance of dark matter. This new interaction takes the form C+D --> C+[phi], where D is the dark matter species present today, [phi] is a standard model species, and C is a very heavy exotic particle. …
-
Exotic Dark Matter in the Early Universe
The fundamental nature of dark matter remains a mystery. As crucial evidence for its existence comes from its effects on early universe observables, perhaps clues to its fundamental nature also reside in its behavior in the early universe. In this thesis, I explore two scenarios in which dark …
-
Boosting (in)direct detection of dark matter
… direct and indirect detection signals of dark matter. More precisely, I study three aspects of dark matter; I use hydrodynamic simulations to extract properties of weakly interacting dark matter that are relevant for both direct and indirect detection signals, and construct viable dark …
-
Structure and Local Properties of Dark Matter Halos
The structure and local properties of dark matter (DM) are important input variables for both direct and indirect detection experiments. Common assumptions about DM, such as, its particle nature being cold and collisionless–CDM–and its distribution in halos being isothermal and spherical, and …
-
Dark Matter Annihilation and the Observed Positron Excess
The composition of dark matter remains an unsolved mystery in astroparticle physics and cosmology. State of the art experiments are searching for dark matter using two different methods: direct detection, in which a WIMP-like particle interacts with a detector in the laboratory, and indirect …
-
Stellar Spiral Structures in Realistic Dark Matter Haloes
… stellar spiral structures embedded in realistic dark matter haloes with very high resolution simulations. I first study the impact of the shape of the dark matter haloes. I find that non-adiabatic changes to the dark matter halo shape, commonly found in cosmological simulations due to the …
-
Dark Matter Search with the PICO-40L Bubble Chamber
The identity of dark matter remains one of the largest unsolved mysteries in modern physics, with international efforts going towards dark matter direct detection. The PICO collaboration, which operates bubble chambers in the search for WIMP-like dark matter, is currently operating the PICO-40L …
Page 1 of 18