Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/10292
Title: The role of cosmology in shaping physics beyond the standard model
Authors: Singh, Poonam
Supervisors: Rakshit, Subhendu
Keywords: Physics
Issue Date: 7-Jun-2022
Publisher: Department of Physics, IIT Indore
Series/Report no.: MS296
Abstract: The presence of dark matter (DM) and its characteristics are deduced indirectly from observed gravitational e↵ects in astronomy and cosmology. The direct obser vation of weak gravitational lens e↵ects near clusters, missing mass dilemma in the study of clusters and galaxies, the structure of galactic rotation curves, and the cor respondence between the cosmic microwave background anisotropies and large-scale structure of the universe, could all be explained by the DM. The Standard Model of particle physics (SMPP) is currently the best theory for characterizing all known fundamental particles. It is a quantum theory that uses quarks and leptons to describe the composition of all known matter. Except the gravity, SM can accommodate three of the four basic forces. The SM has significant limits, despite its success in understanding the cosmos. The SMPP does not contain any appropriate candidate for DM. As a result, new physics models are required to overcome the flaws of the SMPP. Any such physics might have an impact on the universe’s early history. This thesis is based on neutrinos and DM interaction. Our work is model in dependent. The amplitude and position of acoustic peaks in the cosmic microwave background (CMB) are altered as a result of these interactions, and a series of damped oscillations in the matter power spectrum are seen. By studying these im pacts we can predict the features of dark matter particles. By reconciling the impact of dark matter and neutrino interaction on cosmological observations in comparison to the Standard Model of Cosmology, one can resolve one of the longest standing problems, the Hubble tension. Then, we obtain constraints on parameter space for such type of interaction using data obtained from Planck satellite and large-scale structure surveys. Thus, we can limit such proposed theories by applying cosmic limitations.
URI: https://dspace.iiti.ac.in/handle/123456789/10292
Type of Material: Thesis_M.Sc
Appears in Collections:Department of Physics_ETD

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