202010
20190619023654.0
doi
10.5075/epfl-thesis-6351
urn
urn:nbn:ch:bel-epfl-thesis6351-1
nebis
10248176
THESIS
eng
6351
Neutrino and Dark Matter Properties from Cosmological Observations
2014
Lausanne
EPFL
2014
Theses
Prof. O. Schneider (prĂ©sident) ; Dr J. Lesgourgues (directeur) ; Prof. R. Durrer, Dr A.M. Rassat, Dr M. Viel (rapporteurs)
We apply the principles of Bayesian statistics to the main probes of cosmology, in order to refine our knowledge of the Standard Model and possibly extend it. Notably, we investigate the basic elements of the model in detail in order to reinforce this basic foundation of the field, and lay down a systematic way of obtaining model-independent constraints on parts of the Standard Model. We further try to constrain some of the unknown properties of Dark Matter, namely its decay or annihilation rates, to help reducing the range of possibilities for model builders. By using recent cosmological probes and making as little assumptions as possible, we are able to meaningfully constrain these properties in the prospect of narrowing down a particle physics search. Eventually, we show how future experiments will be able to put strong bounds on the neutrino total mass, as long as the theoretical uncertainty is handled carefully. Despite being cautiously pessimistic, we prove how EUCLID will be able to detect even the lowest possible allowed neutrino mass, by simply using properly the linear scales. We also show the target precision for the theoretical prediction in order to make full use of the forthcoming wealth of data at mildly non-linear scales.
cosmology
neutrino
dark matter
parameter extraction
CMB physics
244538
Audren, Benjamin
203646
244363
Lesgourgues, Julien
dir.
184699
44547264
http://infoscience.epfl.ch/record/202010/files/EPFL_TH6351.pdf
n/a
n/a
252301
LPPC
U10869
oai:infoscience.tind.io:202010
thesis-public
DOI
SB
thesis
thesis-bn2018
GLOBAL_SET
DOI2
108898
108898
SB
ITP
EDPY
LPPC
2014-10-3
2014
6351/THESES
EPFL
PUBLISHED
THESIS