Doubly Charged Higgs Boson Generation
Advisor(s)
Dr. Peter Dong; Illinois Mathematics and Science Academy
Discipline
Physical Science
Start Date
21-4-2021 11:55 AM
End Date
21-4-2021 12:20 PM
Abstract
I present a detailed high-level analysis of previous searches for doubly charged Higgs bosons at lower energies and luminosities by CMS and ATLAS. I compare these analyses with simulation results of our own for the currently higher
137 fb-1LHC luminosity with a look at expectations from future higher-energy colliders. The four-lepton signal for doubly charged Higgs events is the chosen signal because it best decreases SM background. I cover doubly charged Higgs production and our focus on the Drell-Yan process instead of others. I generate doubly charged Higgs boson samples with PYTHIA8’s left-right symmetry model package at 13 TeV with B(H±±→e±e±) + B(H±±→μ±μ±) = 100% to identify the characteristics of four lepton doubly-1 charged Higgs events and measure the expected number of events at 137 fb-1. I estimate the capacity for the CMS detector to identify the four lepton signals based on the 850 GeV ATLAS lower limit and calculate lepton efficiencies of 90+% for muons and 75+% for electron 800+GeV. Most reconstructed events are found to have all four leptons. Using a mass window for reconstruction efficiency it is shown that approximately 15 doubly charged Higgs events at 800 GeV are expected to be detected at CMS.
Doubly Charged Higgs Boson Generation
I present a detailed high-level analysis of previous searches for doubly charged Higgs bosons at lower energies and luminosities by CMS and ATLAS. I compare these analyses with simulation results of our own for the currently higher
137 fb-1LHC luminosity with a look at expectations from future higher-energy colliders. The four-lepton signal for doubly charged Higgs events is the chosen signal because it best decreases SM background. I cover doubly charged Higgs production and our focus on the Drell-Yan process instead of others. I generate doubly charged Higgs boson samples with PYTHIA8’s left-right symmetry model package at 13 TeV with B(H±±→e±e±) + B(H±±→μ±μ±) = 100% to identify the characteristics of four lepton doubly-1 charged Higgs events and measure the expected number of events at 137 fb-1. I estimate the capacity for the CMS detector to identify the four lepton signals based on the 850 GeV ATLAS lower limit and calculate lepton efficiencies of 90+% for muons and 75+% for electron 800+GeV. Most reconstructed events are found to have all four leptons. Using a mass window for reconstruction efficiency it is shown that approximately 15 doubly charged Higgs events at 800 GeV are expected to be detected at CMS.