• Browse all
Search for light pseudoscalar boson pairs produced from decays of the 125 GeV Higgs boson in final states with two muons and two nearby tracks in pp collisions at $\sqrt{s}=$ 13 TeV

The CMS collaboration
No Journal Information, 2019

Abstract (data abstract)
CERN-LHC. The analysis searches for pairs of light pseudoscalar bosons, in the mass range from 4 to 15 GeV, produced from decays of the 125 GeV Higgs boson. The decay modes considered are final states that arise when one of the pseudoscalars decays to a pair of tau leptons, and the other one either into a pair of tau leptons or muons. The analysis employs a special analysis strategy to select and identify highly Lorentz-boosted muon or tau lepton pairs with overlapping decay products. This signature is sensitive to specific 2HD+1S models in which the lightest pseudoscalar boson (a) has a large singlet component, and therefore its couplings to SM particles are significantly reduced. The search is based on proton-proton collisions collected by the CMS experiment in 2016 at a center-of-mass energy of 13 TeV that correspond to an integrated luminosity of 35.9 fb-1. No significant excess is observed beyond the expectation from the SM. The table gives upper limits on the cross section times branching fraction for light pseudoscalars with masses between 4 and 15 GeV.

  • Table

    Figure 10 of the paper


    Expected and observed 95% CL upper limits on (sigma(pp->h)/sigma(pp->hSM)) * B(h -> aa -> tautautautau) as a function of m(a)...

Loading Data...