Análisis simplificado de procesos de alta energía con datos abiertos del compact muon solenoid (CMS) : Estudio de la producción de cuatro quarks top en colisiones protón-protón en procesos con un estado final compuesto por un muón y jets, utilizando datos abiertos de la Colaboración CMS.

Abstract

This work presents a study on the search for the production of four top quarks, with the aim of reproducing in a simplified manner the analysis process carried out by the CMS collaboration. The study focuses on the production of the four tops signal in the single lepton plus jets channel with a muon in the final state, at a center-of-mass energy of 13 TeV and a luminosity of 2.26 fb^-1. CERN Open data, including collision data and Monte Carlo simulations, were used for this purpose. The data were processed using Python codes and the CMSSW software, generating NanoAOD format datasets with the expected number of events. Necessary filters were applied for signal event selection while suppressing background events. Histograms of the studied physical variables exhibited agreement between collision data and simulation. Discrimination between signal and background processes was carried out through a multivariate analysis using the Boosted Decision Trees (BDT) technique. The algorithm's performance, assessed through the ROC curve, revealed good discrimination capabilities. No evidence of events with the four top quarks signal in the collision data was found, consistent with the findings reported in the original publication. This study contributes to understanding the processes involved in Particle Physics analyses.