Search for dijet resonances with data scouting in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
CMS-EXO-23-004, 2025.

Abstract (data abstract)
A search is presented for narrow resonances, with a mass between 0.6 and 1.8 TeV, decaying to pairs of jets, in proton-proton collisions at $\sqrt{s}=13$ TeV. The search is performed using dijets that are reconstructed, selected, and recorded in a compact form by the high-level trigger in a technique referred to as "data scouting", from data collected in 2016$-$18 corresponding to an integrated luminosity of 117 fb$^{-1}$. The dijet mass spectra are well described by a smooth parameterization, and no significant evidence for the production of new particles is observed. Model-independent upper limits are presented on the product of the cross section, branching fraction, and acceptance for the individual cases of narrow quark-quark, quark-gluon, and gluon-gluon resonances, and are compared to the predictions from a variety of models of narrow dijet resonance production. The upper limit on the coupling of a dark matter mediator to quarks is presented as a function of the mediator mass. The sensitivity of this search goes beyond what is expected from statistical scaling with luminosity alone, as a consequence of the use of fewer parameters in the background function within a more robust statistical procedure.

  • Differential dijet spectrum (2016)

    Data from Figure 3 (top-left).

    10.17182/hepdata.159438.v1/t1

    Observed differential dijet spectrum using the 2016 data.

  • Differential dijet spectrum (2017)

    Data from Figure 3 (top-right).

    10.17182/hepdata.159438.v1/t2

    Observed differential dijet spectrum using the 2017 data.

  • Differential dijet spectrum (2018)

    Data from Figure 3 (bottom-left).

    10.17182/hepdata.159438.v1/t3

    Observed differential dijet spectrum using the 2018 data.

  • Differential dijet spectrum (Run-2)

    Data from Figure 3 (bottom-right).

    10.17182/hepdata.159438.v1/t4

    Observed differential dijet spectrum using full Run-2 data.

  • Cross-section limits (quark-quark)

    Data from Figure 4 (left).

    10.17182/hepdata.159438.v1/t5

    The observed 95% CL upper limits on the product of the cross section, branching fraction, and acceptance for quark-quark type...

  • Cross-section limits (quark-gluon)

    Data from Figure 4 (middle).

    10.17182/hepdata.159438.v1/t6

    The observed 95% CL upper limits on the product of the cross section, branching fraction, and acceptance for quark-gluon type...

  • Cross-section limits (gluon-gluon)

    Data from Figure 4 (right).

    10.17182/hepdata.159438.v1/t7

    The observed 95% CL upper limits on the product of the cross section, branching fraction, and acceptance for gluon-gluon type...

  • Coupling limits (Quark only)

    Data from Figure 6.

    10.17182/hepdata.159438.v1/t8

    The observed and expected 95% CL upper limits on the universal quark coupling $g_{q}'$ as a function of resonance mass...

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