Search for pair-produced resonances decaying to quark pairs in proton-proton collisions at $\sqrt{s}=$ 13 TeV

The CMS collaboration
No Journal Information, 2018

Abstract (data abstract)
A general search for the pair production of resonances, each decaying to twoquarks, is reported. The search is conducted separately for heavier resonances(masses above 400 GeV), where each of the four final-state quarks generates ahadronic jet resulting in a four-jet signature, and for lighter resonances(masses between 80 and 400 GeV), where the pair of quarks from each resonanceis collimated and reconstructed as a single jet resulting in a two-jetsignature. In addition, a b-tagged selection is applied to target resonanceswith a bottom quark in the final state. The analysis uses data collected withthe CMS detector at the CERN LHC, corresponding to an integrated luminosity of35.9 fb-1, from proton-proton collisions at a center-of-mass energy of 13 TeV.The mass spectra are analyzed for the presence of new resonances, and arefound to be consistent with standard model expectations. The results areinterpreted in the framework of R-parity-violating supersymmetry assuming thepair production of scalar top quarks decaying via the hadronic couplingUDD_{312} or UDD_{323}, and upper limits on the cross section as a function of the top squark mass are set. These results probe a wider range of masses than previously explored at the LHC, andextend the top squark mass limits in the stop->qq scenario.

  • Boosted search: signal efficiency

    Data from Figure 3 (right).

    10.17182/hepdata.85857.v1/t1

    Signal efficiency as a function of stop mass for the inclusive and b-tagged selections. Efficiency is estimated from the number...

  • Average pruned jet mass spectrum (Inclusive analysis)

    Data from Figure 5 (left).

    10.17182/hepdata.85857.v1/t2

    Boosted search average pruned mass distribution for data (black points) and for the total background prediction for the inclusive selection.

  • Average pruned jet average mass spectrum (B-tagged analysis)

    Data from Figure 5 (right).

    10.17182/hepdata.85857.v1/t3

    Boosted search average pruned mass distribution for data and for the total background prediction for the b-tagged selection.

  • Average dijet mass spectrum (Inclusive analysis)

    Data from Figure 9 (left).

    10.17182/hepdata.85857.v1/t4

    Resolved search distribution of average dijet mass for the data, along with the resulting fit to the functional form for...

  • Average dijet mass spectrum (B-tagged analysis)

    Data from Figure 9 (right).

    10.17182/hepdata.85857.v1/t5

    Resolved search distribution of average dijet mass for the data, along with the resulting fit to the functional form for...

  • Resolved search: signal efficiency

    Data from Figure 10 (right).

    10.17182/hepdata.85857.v1/t6

    Signal efficiency as a function of stop mass for the inclusive and b-tagged selections. Efficiency is estimated from the number...

  • Statistical interpretation for inclusive selection.

    Data from Figure 11 (left).

    10.17182/hepdata.85857.v1/t7

    Observed and expected 95% CL upper limits on the signal cross section as a function of stop mass. The branching...

  • Statistical interpretation for b-tagged selection.

    Data from Figure 11 (right).

    10.17182/hepdata.85857.v1/t8

    Observed and expected 95% CL upper limits on the signal cross section as a function of stop mass. The branching...

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