CMS-PAS-B2G-20-009

CMS-PAS-B2G-20-009
Search for new heavy resonances decaying to WW, WZ, ZZ, WH, or ZH boson pairs in the all-jets final state in proton-proton collisions at $\sqrt{s}= $ 13 TeV
CMS Collaboration
March 2022

Abstract: A search for new heavy resonances decaying to WW, WZ, ZZ, WH, or ZH boson pairs in the all-jets final state with the CMS experiment at the LHC is reported. The analysis is carried out using the proton-proton collision data set recorded by the CMS detector in 2016-2018 at a centre-of-mass energy $\sqrt{s}= $ 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The search is sensitive to resonances with masses above 1.3 TeV, decaying to bosons that are highly Lorentz-boosted such that they form a single large-radius jet. Novel machine learning techniques are employed to distinguish jets from W, Z, and H decays from other jets. Events are categorized based on the kinematic properties of two additional jets to gain sensitivity to resonances produced via vector boson fusion. No significant excess over the estimated standard model background prediction is observed. The maximum local significance of 3.6 standard deviations, corresponding to a global significance of 2.3 standard deviations, is observed for mild excesses of events at masses of 2.1 and 2.9 TeV. In a heavy vector triplet model, spin-1 Z' and W' resonances with masses below 4.8 TeV are excluded at the 95% confidence level (CL). These limits are the most stringent to date. In a bulk graviton model, spin-2 gravitons and spin-0 radions with masses below 1.4 TeV and 2.7 TeV, respectively, are excluded at 95% CL. Production through vector boson fusion of these resonances is constrained with upper cross section limits at 95% CL as low as 0.1 fb.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, PLB 844 (2023) 137813. The superseded preliminary plots can be found here.

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