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Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

The CMS collaboration
Eur.Phys.J. C76 (2016) 371, 2016

Abstract (data abstract)
CERN-LHC. A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at sqrt(s) = 8 TeV. The data correspond to an integrated luminosity of 19.7 inverse femtobarns. The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t t-bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95% confidence level for the product of the production cross section and branching fraction sigma(gg to X) B(X to HH to b b-bar b b-bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with a mass scale Lambda[R] = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV.

  • Table 1

    Data from Figure 4 (top) of paper

    10.17182/hepdata.73976.v1/t1

    Observed $m_\mathrm{jj}$ spectrum (black points) compared with a background estimate (black line), obtained in background only hypothesis, for HPHP category....

  • Table 2

    Data from Figure 4 (bottom-left) of paper

    10.17182/hepdata.73976.v1/t2

    Observed $m_\mathrm{jj}$ spectrum (black points) compared with a background estimate (black line), obtained in background only hypothesis, for HPLP category....

  • Table 3

    Data from Figure 4 (bottom-right) of paper

    10.17182/hepdata.73976.v1/t3

    Observed $m_\mathrm{jj}$ spectrum (black points) compared with a background estimate (black line), obtained in background only hypothesis, for LPHP category....

  • Table 4

    Data from Figure 5 (top) of paper

    10.17182/hepdata.73976.v1/t4

    Observed and expected 95% CL upper limits on the product of cross section of a narrow resonance and the branching...

  • Table 5

    Data from Figure 5 (bottom-left) of paper

    10.17182/hepdata.73976.v1/t5

    Observed and expected 95% CL upper limits on the product of cross section of a narrow resonance and the branching...

  • Table 6

    Data from Figure 5 (bottom-right) of paper

    10.17182/hepdata.73976.v1/t6

    Observed and expected 95% CL upper limits on the product of cross section of a narrow resonance and the branching...

  • Table 7

    Data from table 4 of paper

    10.17182/hepdata.73976.v1/t7

    Observed and expected 95% CL upper limits on the product of cross section and the branching fraction $\sigma(gg \to X)...

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