CMS-PAS-EXO-19-012

CMS-PAS-EXO-19-012
A search for dijet resonances in proton-proton collisions at $\sqrt{s}= $ 13 TeV with a new background prediction method
CMS Collaboration
July 2019

Abstract: Searches for narrow and broad resonances with a mass greater than 1.8 TeV decaying to a pair of jets are presented using proton-proton collision data at $\sqrt{s}= $ 13 TeV corresponding to an integrated luminosity of 137 fb$^{-1}$. The background arising from standard model processes is predicted using two complementary data-driven methods. The dijet invariant mass spectrum is well described by both methods, and no significant evidence for the production of new particles is observed. Model independent upper limits at 95% confidence level are reported on the production cross section of narrow resonances, and broad resonances with widths up to 30% of the resonance mass, extending previous searches. The limits are applied to various models of narrow resonances and exclude, at 95% confidence level: string resonances with masses below 7.9 TeV, scalar diquarks below 7.5 TeV, axigluons and colorons below 6.6 TeV, excited quarks below 6.3 TeV, color-octet scalars below 3.7 TeV, W' bosons below 3.6 TeV, Z' bosons with SM-like couplings below 2.9 TeV and between 3.1 TeV and 3.3 TeV, Randall-Sundrum Gravitons below 2.6 TeV TeV, and dark matter mediators below 2.8 TeV. Limits on dark matter mediators are presented as a function of resonance mass and width, and equivalently coupling, which exclude at 95% confidence level a dark matter mediator with mass less than 4.7 TeV for a width equal to 25% of the mass.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, JHEP 05 (2020) 033. The superseded preliminary plots can be found here.

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