Implementación de la cadena completa de simulación para el modelo de materia oscura singlete escalar (ssdm) como extensión del modelo estándar

Abstract

This document presents the implementation of the complete Monte Carlo Simulation Chain for the Scalar Singlet Dark Matter model. The work starts from the lagrangian of the model itself, Feynman rules are obtained computationally and these rules are used to simulate Monte Carlo parton level events of scalar Dark Matter particles production at the Large Hadron Collider. Then, hadronization, parton shower, initial and final state radiation, and underlying events are added to the simulation. Finally, a fast simulation is performed for the CMS detector in order to obtain the signal that would generate the studied process. This simulation chain is performed mapping a region of interest of the parameter space. The resulting signal is compared with a background process and different cases where the scalar singlet particles can and cannot be discriminated. At last, considering an uncertainty of 17%, a value of 9,7 fb was computed as the maximum cross section that the process could have without being able to discriminate it from the background.