The impact of additional scalar bosons at the LHC

High Energy Particle Physics Workshop 2016

Kumar, Mukesh^1 ; Von Buddenbrook, Stefan^1 ; Chakrabarty, Nabarun^2 ; Cornell, Alan S.^1 ; Kar, Deepak^1 ; Mandal, Tanumoy^3 ; Mellado, Bruce^1 ; Mukhopadhyaya, Biswarup^2 ; Reed, Robert G.^1

National Institute for Theoretical Physics, School of Physics, Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Wits, Johannesburg

2050, South Africa^1

Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad

211 019, India^2

Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala

SE-751 20, Sweden^3

关键词: Branching ratio;    Dark matter;    Higgs doublet models;    Large Hadron Collider;    Mass spectra;    Missing energy;    The standard model;    Transverse momentum distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/802/1/012007/pdf
DOI  :  10.1088/1742-6596/802/1/012007

来源: IOP

【 摘 要 】

In this study we consider an effective model by introducing two hypothetical real scalars, H and χ - a dark matter candidate, where the masses of these scalars are 2mhHtand mχ≈ mt/2 with mhand mtbeing the Standard Model Higgs boson and top quark masses, respectively. A distortion in the transverse momentum distributions of h in the intermediate region of the spectrum through the processes pp → H → hχχcould be observed in this model. An additional scalar, S, has been postulated to explain large H → hχχbranching ratios, assuming mh mS mH- mhand mS> 2mx. Furthermore, a scenario of a two Higgs doublet model (2HDM) is introduced and a detailed proposal at the present energies of the Large Hadron Collider to study the extra CP-even (h, H), CP-odd (A) and charged (H±) scalars has been pursued. With possible phenomenological implications, production and decay modes for these scalars are discussed. Based on the mass spectrum of H, A and H±, the production of multi-leptons and Z+jets+missing-energy events are predicted. A specific, Type-II 2HDM model is discussed in detail.