Signal Parameterization Uncertainties in the Search for the Doubly Charged Higgs Boson
Session Number
2
Advisor(s)
Dr. Peter Dong, IMSA
Location
B110
Discipline
Physical Science
Start Date
15-4-2026 11:10 AM
End Date
15-4-2026 11:55 AM
Abstract
The left-right symmetric model (LRSM) restores the left-right symmetry broken by parity violation in the weak interaction of the Standard Model (SM) and predicts the existence of a doubly-charged Higgs boson (H++ ). Our analysis calculates limits on the production cross section of the doubly charged Higgs boson using an unbinned likelihood fit. Since the extracted limits depend on the parameterization of the signal shape, it is important to assess the effect of the choice of fit model. A double-sided Crystal Ball function is currently used, but other parameterizations exist and may offer different results. We examine two such parameterization functions, the Pearson type IV distribution and the Voigt profile, and evaluate their effect on the mass limit of the doubly charged Higgs boson. We focus on the four-electron channel and perform the fit on the same-sign invariant mass distribution over the mass range 500-1500 GeV.
Signal Parameterization Uncertainties in the Search for the Doubly Charged Higgs Boson
B110
The left-right symmetric model (LRSM) restores the left-right symmetry broken by parity violation in the weak interaction of the Standard Model (SM) and predicts the existence of a doubly-charged Higgs boson (H++ ). Our analysis calculates limits on the production cross section of the doubly charged Higgs boson using an unbinned likelihood fit. Since the extracted limits depend on the parameterization of the signal shape, it is important to assess the effect of the choice of fit model. A double-sided Crystal Ball function is currently used, but other parameterizations exist and may offer different results. We examine two such parameterization functions, the Pearson type IV distribution and the Voigt profile, and evaluate their effect on the mass limit of the doubly charged Higgs boson. We focus on the four-electron channel and perform the fit on the same-sign invariant mass distribution over the mass range 500-1500 GeV.