CMS-PAS-EXO-24-038

CMS-PAS-EXO-24-038
Search for resonant production of pairs of dijet resonances through broad mediators in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
CMS Collaboration
23 March 2025

Abstract: A reinterpretation of a prior narrow resonance search is performed to investigate resonant production of dijet resonance pairs via broad mediators. This analysis targets events with four resolved jets, requiring dijet invariant masses $ > $ 0.2 TeV and four-jet invariant masses $ > $ 1.6 TeV. The search has been conducted using proton-proton collision data collected in Run 2 by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The benchmark model considered involves the production of heavy new resonances with widths ranging from 1.5% to 10%, decaying to a pair of vector-like quarks, which in turn each decay to a pair of jets. This signature probes resonant production in the four-jet and dijet mass distributions. Both upper limits at 95% CL and significances are reported on the production cross section of new resonances as a function of their width and masses, between 2 and 10 TeV. In particular, for the 8 TeV four-jet mass region, where there was an excess in the previous narrow resonance search, the significance of an 8-10 TeV diquark resonance is found to be relatively insensitive to the choice of width, making a broad resonance an equally valid interpretation of the excess.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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