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Collider Search Constraints on Singlet-Doublet Fermionic Dark Matter Model

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dc.contributor.advisor Bhattacharya, Subhaditya en_US
dc.contributor.author KADAM, SAURABH en_US
dc.date.accessioned 2018-05-10T03:06:01Z
dc.date.available 2018-05-10T03:06:01Z
dc.date.issued 2018-05 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/938
dc.description This thesis reviews the simplest fermion mixing dark matter model, singlet-doublet fermionic dark matter (SDFDM), in light of recent relic density and direct search experiments and puts collider search constraints on the available parameter space. The thesis includes an introduction to dark matter physics and reviews experimental methodologies of dark matter detection. It then describes the standard model and the explains SDFDM model. Relic density and direct search constraints are then imposed on the parameter space using Micro OMEGA. After a brief review of collider physics, we then look for collider signal of multi-leptonic final state for four benchmark points from allowed parameter space and displaced vertex signal on overall parameter space. en_US
dc.description.abstract Dark matter (DM) physics is one of the major areas of recent particle physics research. Even after finding hints from rotational curves, inhomogeneities in CMBR, bullet cluster and indirect evidence from astrophysics, the exact nature of DM is still unknown. Particle physics research for DM has been guided by postulating DM primarily as a weakly interacting massive particle (WIMP) which freezes out from equilibrium distribution in the early universe and contributes to the observed relic density. The spin of the DM is completely unconstrained. In this thesis, we took up a minimal fermionic mixing DM model of a standard model(SM) SU(2) singlet and a doublet that already has been proposed in the literature and updated the allowed parameter space under relic density criteria and recent direct search experiment, PandaX. We studied in details the prospect of discovering it at the Large Hadron Collider for multilepton final state with 2, 3 and 4 leptons using monte carlo simulation methods. The analysis is done for few benchmark points in the parameter space allowed by relic density and direct detection criteria. We obtained that this model is very difficult to detect in future LHC runs at high luminosity due to heavy background from SM processes. But the significant region of the parameter space can still be tested for displaced charged vertex at LHC. en_US
dc.description.sponsorship Indian Institute of Science Education and Research (IISER), Pune. en_US
dc.language.iso en en_US
dc.subject 2018
dc.subject Physics en_US
dc.subject Dark matter en_US
dc.subject Particle physics en_US
dc.subject Weakly interacting massive particle en_US
dc.subject Singlet-doublet fermionic dark matter en_US
dc.title Collider Search Constraints on Singlet-Doublet Fermionic Dark Matter Model en_US
dc.type Thesis en_US
dc.type.degree BS-MS en_US
dc.contributor.department Dept. of Physics en_US
dc.contributor.registration 20131082 en_US


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  • MS THESES [1705]
    Thesis submitted to IISER Pune in partial fulfilment of the requirements for the BS-MS Dual Degree Programme/MSc. Programme/MS-Exit Programme

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