Speaker: Prof. Abdesslam Arhrib (Abdelmalek Essaadi University)
Talk title: Particle Physics Journal Club] New Discovery modes for a light charged Higgs boson at the LHC.
Time: 2024/08/22 (Thur.) 12:30 
Place: R517, New Physics Building 

Abstract:
In this talk, we first briefly review the production and decay of charged Higgs bosons at the LHC. Then, we suggest a new searches at the LHC for light charged Higgs bosons through their pair production channels, such as pp → H+h, H+A, and pp → H+H− in the Type-I and X scenarios of the 2-Higgs Doublet Model (2HDM). By focusing on the case where the heavy H state plays the role of the SM-like Higgs boson with a mass near 125 GeV, we study the aforementioned Higgs boson pair production channels and investigate their bosonic decays, such as H+ → W+h and/or H+ → W+A. We show that such di-Higgs production and decay channels can give birth to signatures with event rates significantly bigger than those coming from the conventional pp → tt → tbH- + c.c. for a light charged Higgs boson state, with mH± < mt, at the LHC. In particular, we look at the light higgs decays into bb, τ+τ−, or γ γ. Under these conditions , we find that the production and decay process pp → H+h → W+(∗)hh → ℓν + 4 γ  (ℓ = e, μ) is essentially background free. We perform a comprehensive full Monte Carlo (MC) analysis at the detector level demonstrating that such a W+4γ signal is very promising.