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Search for heavy resonances decaying into two Higgs bosons or into a Higgs boson and a W or Z boson in proton-proton collisions at 13 TeV

The CMS collaboration
JHEP 1901 (2019) 051, 2019

Abstract (data abstract)
A search is presented for massive narrow resonances decaying either into two Higgs bosons, or into a Higgs boson and a W or Z boson. The decay channels considered are $HH \rightarrow b\bar{b}\tau^{+}\tau^{-}$ and $VH \rightarrow q\bar{q}\tau^{+}\tau^{-}$,where H denotes the Higgs boson, and V denotes the W or Z boson. This analysis is based on a data sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV by the CMS Collaboration, corresponding to an integrated luminosity of 35.9 fb$^{−1}$. For the TeV-scale mass resonances considered, substructure techniques provide ways to differentiateamong the hadronization products from vector boson decays to quarks, Higgs boson decays to bottom quarks, and quark- or gluon-induced jets. Reconstruction techniques are used that have been specifically optimized to select events in which the tau lepton pair is highly boosted. The observed data are consistent with standard model expectations and upper limits areset at 95% confidence level on the product of cross section and branching fraction for resonance masses between 0.9 and 4.0 TeV. Exclusion limits are set in the context of bulk radion and graviton models: spin-0 radion resonances are excluded below a mass of 2.7 TeV at 95% confidence level. In the spin-1 heavy vector triplet framework, mass-degenerate W' and Z' resonances with dominant couplings to the standard model gauge bosons are excluded below a mass of 2.8 TeV at 95% confidence level. These are the first limits for these decay channels at 13 TeV.

  • Figure 5a

    Data from Figure 5a, located on page 13.

    10.17182/hepdata.88169.v1/t1

    Observed 95% CL upper limits on the product of the production cross section and the branching fraction for a new...

  • Figure 5b

    Data from Figure 5b, located on page 13.

    10.17182/hepdata.88169.v1/t2

    Observed 95% CL upper limits on the product of the production cross section and the branching fraction for a new...

  • Figure 6a

    Data from Figure 6a, located on page 14.

    10.17182/hepdata.88169.v1/t3

    Observed 95% CL upper limits on the product of the production cross section and the branching fraction for a new...

  • Figure 6b

    Data from Figure 6b, located on page 14.

    10.17182/hepdata.88169.v1/t4

    Observed 95% CL upper limits on the product of the production cross section and the branching fraction for a new...

  • Figure 7a

    Data from Figure 7a, located on page 14.

    10.17182/hepdata.88169.v1/t5

    Observed 95% CL upper limits on the product of the production cross section and the branching fraction for a new...

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