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Search for a light charged Higgs boson in the H$^\pm$ $\to$ cs channel in proton-proton collisions at $\sqrt{s} =$ 13 TeV

The collaboration
Phys.Rev.D 102 (2020) 072001, 2020.

Abstract (data abstract)
A search is conducted for a low-mass charged Higgs boson produced in a top quark decay and subsequently decaying into a charm and a strange quark. The data sample was recorded in proton-proton collisions at $\sqrt{s}=13 TeV$ by the CMS experiment at the LHC and corresponds to an integrated luminosity of 35.9/fb. The search is performed in the process of top quark pair production, where one top quark decays to a bottom quark and a charged Higgs boson, and the other to a bottom quark and a W boson. With the W boson decaying to a charged lepton (electron or muon) and a neutrino, the final state comprises an isolated lepton, missing transverse momentum, and at least four jets, of which two are tagged as b jets. To enhance the search sensitivity, one of the jets originating from the charged Higgs boson is required to satisfy a charm tagging selection. No significant excess beyond standard model predictions is found in the dijet invariant mass distribution. An upper limit in the range 1.68--0.25% is set on the branching fraction of the top quark decay to the charged Higgs boson and bottom quark for a charged Higgs boson mass between 80 and 160 GeV.

• #### Figure 4a

Data from Figure 4a

10.17182/hepdata.94261.v1/t1

Expected and observed 95% CL exclusion limits in % on BR(t->H+ b) for the muon channel after the individual charm...

• #### Figure 4b

Data from Figure 4b

10.17182/hepdata.94261.v1/t2

Expected and observed 95% CL exclusion limits in % on BR(t->H+ b) for the electron channel after the individual charm...

• #### Figure 4c

Data from Figure 4c

10.17182/hepdata.94261.v1/t3

Expected and observed 95% CL exclusion limits in % on BR(t->H+ b) after the individual charm tagging categories and the...