2012/12/20 by Radovan Dermíšek, R. Dermisek, Enrico Lunghi +3
Computer Science · Physics and Astronomy · #Boson #Computational Physics and Python Applications #Higgs boson #Large Hadron Collider #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Standard Model (mathematical formulation) #Top quark #Two-Higgs-doublet model #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep04(2013)063
42 pages, 15 figures
arxiv created 2012/12/20 · openalex publication_date 2013/04/01 · arxiv updated 2015/06/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In singlet extensions of the two Higgs doublet model, a light CP-odd Higgs boson (A) can significantly modify decay modes of the charged Higgs, without necessarily affecting decay modes of the standard model-like Higgs boson. These effects can be sizable even if the doublet component of the light CP-odd Higgs is small, so that constraints from Upsilon decays and direct CP-odd Higgs production do not apply. We study a scenario in which the charged Higgs is produced in top quark decays, t -> H+ b, with dominant H+ -> W A. We focus on the CP-odd Higgs mass range below the bb threshold. We summarize all current experimental constraints and find that, as a result of H+ -> W A dominance, this scenario is not constrained in a large region of tan(beta), mH+, and CP-odd Higgs doublet component. We discuss search strategies based on A -> tau tau, with both taus decaying leptonically, and on the subleading decay mode A -> mu mu. We show that a search for t -> H+ b, H+ -> W A, A -> mu mu in 20 fb-1 of 8 TeV LHC data can constrain most of the currently allowed parameter space. Existing trilepton searches are not sensitive to this signal due to the adopted isolation criteria.