Abstract
We analyse a light charged Higgs boson in the 2-Higgs Doublet Model (2HDM) Type-I, when its mass satisfies the condition MH± < Mt + Mb and the parameter space is consistent with theoretical requirements of self-consistency as well as the latest experimental constraints from Large Hadron Collider (LHC) and other data. Over such a parameter space, wherein the Standard Model (SM)-like state discovered at the LHC in 2012 is the heaviest CP-even state of the 2HDM, it is found that the decay modes of the charged Higgs boson are dominated by H ± → W ±(∗)h. Furthermore, the light neutral Higgs boson h dominantly decays into two photons. Under these conditions, we find that the production and decay process pp → H ±h → W ±(∗)hh → ℓνℓ + 4γ (ℓ = e, μ) is essentially background free. However, since the W ±(∗) could be largely off-shell and the h state is very light, so that both the lepton coming from the former and the photons coming from the latter could be rather soft, we perform here a full Monte Carlo (MC) analysis at the detector level demonstrating that such a W ± + 4γ signal is very promising, as it would be yielding significant excesses at the LHC with an integrated luminosity of L = 300 fb−1 at both \( \sqrt{s} \) = 13 and 14 TeV.
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Wang, Y., Arhrib, A., Benbrik, R. et al. Analysis of W± + 4γ in the 2HDM Type-I at the LHC. J. High Energ. Phys. 2021, 21 (2021). https://doi.org/10.1007/JHEP12(2021)021
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DOI: https://doi.org/10.1007/JHEP12(2021)021