# A multi-dimensional search for new heavy resonances decaying to boosted WW, WZ, or ZZ boson pairs in the dijet final state at 13 TeV

## TL;DR

This paper presents a novel three-dimensional analysis method to search for heavy resonances decaying into WW, WZ, or ZZ boson pairs in the dijet final state at 13 TeV, setting new limits on resonance masses.

## Contribution

It introduces a new analysis technique using a three-dimensional maximum likelihood fit to improve sensitivity in heavy resonance searches in dijet events.

## Key findings

- No significant excess observed above background.
- Excluded Z' and W' resonances below 3.5 and 3.8 TeV.
- Set the most stringent limits to date in the dijet final state.

## Abstract

A search in an all-jet final state for new massive resonances decaying to WW, WZ, or ZZ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 fb$^{-1}$ recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 TeV. The search is focussed on potential resonances with masses above 1.2 TeV, where the decay products of each W or Z boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed above the estimated standard model background. In a heavy vector triplet model, spin-1 Z' and W' resonances with masses below 3.5 and 3.8 TeV, respectively, are excluded at 95% confidence level. In a narrow-width bulk graviton model, upper limits on cross sections are set between 27 and 0.2 fb for resonance masses between 1.2 and 5.2 TeV, respectively. The limits presented in this paper are the best to date in the dijet final state.