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Dark matter and twin Higgs models

Grant number: 19/00890-2
Support type:Scholarships abroad - Research Internship - Master's degree
Effective date (Start): February 22, 2019
Effective date (End): August 21, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Gustavo Alberto Burdman
Grantee:Davi Bastos Costa
Supervisor abroad: Roni Harnik
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Local de pesquisa : Fermi National Accelerator Laboratory (Fermilab), United States  
Associated to the scholarship:18/09833-9 - Dark matter and twin Higgs models, BP.MS

Abstract

The Standard Model (SM) of particle physics describes ordinary matter and its interactions and it has been tested to an excellent precision up to the energies reached in current high energy physics experiments, most notably the Large Hadron Collider (LHC). It makes many predictions and has successfully passed many experimental tests, often to high precision. However, it is likely that there is physics beyond the Standard Model (BSM) because there are a number of problems, missing ingredients, and open questions. In this project we are mainly interested in three problems: the hierarchy problem, the nature of Dark Matter and the nature of neutrino masses. In particular we will concentrate in the Twin Higgs (TH) model. The TH was initially developed to solve the hierarchy problem by assuming that the Higgs boson is a pseudo-Nambu-Goldstone boson (pNGB) which results from the spontaneous symmetry breaking of a global symmetry. However, the model predicts a Twin sector, which is an almost exact copy of the SM, and therefore supplies good candidates for dark matter. In this project, we will consider the spontaneous breaking of the necessary Z2 symmetry in TH models, which can be used to give masses to neutrinos and twin neutrinos, and therefore evading an important constraint from cosmology. Therefore, the TH is a very promising framework to address the problems we are mainly interested in these project.