Investigating Resonant Higgs Signatures in the Context of a Two Higgs Doublet Model (2HDM)

Giraldo, Yithsbey (2024) Investigating Resonant Higgs Signatures in the Context of a Two Higgs Doublet Model (2HDM). In: 9th Colombian Meeting on High Energy Physics, 3 de Diciembre 2024, Pasto, Colombia.

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Resumen

In this study, we investigate Higgs-like resonant signals and recent anomalies found in searches for high-mass scalar resonances at the LHC. We propose a Two-Higgs-Doublet Model (2HDM) as a natural extension of the Standard Model to account for these phenomena, incorporating a scalar singlet for additional flexibility. The model's Higgs sector consists of two CP-odd bosons and one charged scalar boson, resulting in three CP-even scalar bosons, one CP-odd scalar, and one charged scalar. Our analysis focuses on determining the masses of these particles and comparing them with reported experimental anomalies. Among the key findings, we identify a light neutral scalar with a mass around 95 GeV and a charged Higgs close to 130 GeV. Furthermore, we explore scalar resonances decaying into photon pairs with masses of about 95 GeV and 152 GeV, as well as an excess in diboson events at 680 GeV observed by CMS. We consider two possible charge configurations for the scalar singlet, leading to distinct cubic or quartic couplings in the scalar sector. Through an exploration of the scalar potential and parameter space, we align the predicted masses with the observed anomalies. We find that the 95 GeV scalar fits well with the lightest CP-even Higgs, while the charged Higgs at 130 GeV also falls within our model's predictions. Our results show strong agreement between these experimental excesses and regions of high solution density in our theoretical framework.

Tipo de Elemento:	Conferencia o Taller artículo (Poster)
Palabras Clave:	Modelo de Dos Dobletes de Higgs (2HDM), señales resonantes tipo Higgs, resonancias escalares de alta masa, anomalías experimentales del LHC, bosón de Higgs cargado, bosones CP-par, bosones CP-impar, singlete escalar, potencial escalar, sector de Higgs extendido, decaimiento a pares de fotones, resonancias diphoton, exceso de eventos dibosón, CMS, espacio de parámetros, masas escalares, Higgs ligero de 95 GeV, Higgs cargado de 130 GeV, resonancia de 152 GeV, resonancia de 680 GeV, acoplamientos cúbicos y cuárticos, física más allá del Modelo Estándar, fenomenología del Higgs, extensiones del Modelo Estándar, partículas escalares exóticas, colisionador LHC.
Asunto:	Q Ciencias > Q Science (General) Q Ciencias > QC Physics
Division:	Facultad de Ciencias Exactas y Naturales > Programa de Física > Eventos
Depósito de Usuario:	Prof. Yithsbey / Y. Giraldo
Fecha Deposito:	14 May 2026 16:00
Ultima Modificación:	14 May 2026 16:00
URI:	http://sired.udenar.edu.co/id/eprint/15797

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