CMS-PAS-HIG-18-020

CMS-PAS-HIG-18-020
Search for a light charged Higgs boson decaying to a W boson and a CP-odd Higgs boson in $\mathrm{e}\mu\mu$ / $\mu\mu\mu$ + jets channels in proton-proton collisions at $\sqrt{s}=$ 13 TeV
CMS Collaboration
March 2019

Abstract: A search for a light charged Higgs boson ( $\mathrm{H}^{+}$ ) decaying to a W boson and a CP-odd Higgs boson (A) is performed using data from proton-proton collisions at $\sqrt{s}=$ 13 TeV. The data were recorded by the CMS detector at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb $^{-1}$ . In this search, it is assumed that the $\mathrm{H}^{+}$ boson is produced in decays of top quarks, and the A boson decays to two opposite-charge muons. The presence of signals for $\mathrm{H}^{+}$ boson masses between 100 and 160 GeV and A boson masses between 15 and 75 GeV is investigated. No evidence for the production of the $\mathrm{H}^{+}$ boson is found. Assuming branching ratios $\mathcal{B}(\mathrm{H}^{+}\to\mathrm{W}^{+}\mathrm{A})=$ 1 and $\mathcal{B}(\mathrm{A}\to\mu^{+}\mu^{-})=3\times10^{-4}$ , upper limits at 95% confidence level on the branching fraction of the top quark, $\mathcal{B}(\mathrm{t}\to\mathrm{b}\mathrm{H}^{+})$ , of 0.63 to 2.9% are obtained, depending on the masses of the $\mathrm{H}^{+}$ and A bosons.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, PRL 123 (2019) 131802. The superseded preliminary plots can be found here.

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