Abstract
In the light of the most recent data from Higgs boson searches and analyses, we re-assess the scope of the Large Hadron Collider in accessing heavy charged Higgs boson signals in $b\bar b W^\pm$ final states, wherein the contributing channels can be $H^+\to t\bar b$, $hW^\pm, HW^\pm$ and $AW^\pm$. We consider a 2-Higgs Doublet Model Type-II and we assume as production mode $bg\to tH^-$ + c.c., the dominant one over the range $M_{H^\pm}\ge 480$ GeV, as dictated by $b\to s\gamma$ constraints. Prospects of detection are found to be significant for various Run 2 energy and luminosity options.
Highlights
The discovery of a charged Higgs boson would signal the existence of a second Higgs doublet in addition to the Standard Model (SM)-like one already established through the discovery of the W ± and Z bosons at the Sp p S in the eighties and of a Higgs boson itself at the LHC only four years ago
The 2-Higgs Doublet Models (2HDMs) is the minimal extension of the SM that predicts the existence of charged Higgs bosons in the particle spectrum
Larger values of the masses are excluded, there is a strong dependence on the Yukawa model type
Summary
The discovery of a (singly) charged Higgs boson would signal the existence of a second Higgs doublet in addition to the Standard Model (SM)-like one already established through the discovery of the W ± and Z bosons at the Sp p S in the eighties and of a Higgs boson itself at the LHC only four years ago. Constraints from b → sγ decays put a lower limit on the H± mass at about 480 GeV, rather independently of tan β [2], the ratio of the Vacuum Expectation Values (VEVs) of the two doublets Such a heavy mass region is very difficult to access because of the large reducible and irreducible backgrounds associated with the main decay mode H+ → tb , following the dominant production channel bg → t H− [3]. The knowledge of its mass provides an additional handle in the kinematic selection when reconstructing a Breit–Wigner resonance in the hSM → bbdecay channel, thereby significantly improving the signal-to-background ratio afforded by pre-Higgs-discovery analyses [15,16] Such a study found that, while this channel does not show much promise for a supersymmetric H± state, significant portions of the parameter spaces of several 2HDMs are testable at Run 2. We draw our conclusions based on the results obtained
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