Cosmological Probes of Physics Beyond the Standard Model

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dc.contributor.advisorSundrum, Ramanen_US
dc.contributor.authorKumar, Soubhiken_US
dc.contributor.departmentPhysicsen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-09-25T05:36:17Z
dc.date.available2020-09-25T05:36:17Z
dc.date.issued2020en_US
dc.description.abstractThe Standard Model (SM) of particle physics can explain a diverse variety of experimental observations. However, there remain multiple compelling reasons why we believe that the SM is not the final theory of the universe. In this thesis, we first briefly discuss some of those shortcomings of the SM, and then focus on ways in which cosmological observations can be used to probe theories beyond the SM. The primary probe we consider for this purpose is primordial non-Gaussianity (NG) of cosmological perturbations. We show that by precise studies of NG we can probe ultra-high energy gauge theories that might otherwise be energetically completely inaccessible to terrestrial experiments, by focusing first on (i) generic spontaneously broken Higgsed gauge theories, and then on, (ii) higher-dimensional Grand Unified Theories (GUTs). Building upon this, we also discuss a simple curvaton extension of the standard inflationary paradigm where strength of various NG signals can be orders of magnitude larger, and thus be easily accessible via observations in the coming decade.en_US
dc.identifierhttps://doi.org/10.13016/cicw-horz
dc.identifier.urihttp://hdl.handle.net/1903/26447
dc.language.isoenen_US
dc.subject.pqcontrolledParticle physicsen_US
dc.subject.pquncontrolledBeyond Standard Model Physicsen_US
dc.subject.pquncontrolledExtra Dimensionen_US
dc.subject.pquncontrolledGauge Theoryen_US
dc.subject.pquncontrolledGrand Unified Theoryen_US
dc.subject.pquncontrolledPrimordial Non-Gaussianityen_US
dc.titleCosmological Probes of Physics Beyond the Standard Modelen_US
dc.typeDissertationen_US

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