Search for new physics in the Large Hadron Collider

Author(s)

Eduardo da Silva Almeida

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Física (IF/SBI)
• Defense date: 2022-03-18

Examining board members

Oscar Jose Pinto Eboli; Enrico Bertuzzo; Alex Gomes Dias; Andre Paniago Lessa; Ricardo D'Elia Matheus

• Advisor: Oscar Jose Pinto Eboli

Abstract

In this work we search for signals of a new physics through triple gauge couplings, Higgs couplings and gauge boson couplings to fermions in three different analysis. In the first one, weve made a global analysis with the most of the accumulated data from Large Electron-Positron collider and Large Hadron Collider, in the second it was studied the eletroweak dipole operators with the data available to 2019 and finally we studied the impact of the fermionic operators in the measure of the Higgs width using off-shell process. For this, we parametrize the new physics effects in terms of an effective lagrangian with dimension-six operators. With the eletroweak precision data, eletroweak diboson production data, Higgs data and Drell-Yan, we perform a statistical analysis where the Wilson coefficients are treated as free parameters. We base our choice of operators which are most related to the data set. Next, we obtain the allowed confidence intervals for the Wilson coefficients. (AU)

• FAPESP's process: 18/16921-1 - Seach for new Physics on large hadron collider
• Grantee: Eduardo da Silva Almeida
• Support Opportunities: Scholarships in Brazil - Doctorate