Searching for diboson resonances in the boosted all-hadronic final state at $\sqrt{\rm{s}}=13$ TeV with CMS

TL;DR

This paper reports on three CMS searches for diboson resonances in all-hadronic final states at 13 TeV, utilizing advanced jet substructure techniques and a new vector boson tagging algorithm to enhance sensitivity.

Contribution

It introduces a new vector boson tagging algorithm and a multidimensional fit, significantly improving the sensitivity of diboson resonance searches in the dijet final state.

Findings

First search for diboson resonances at 13 TeV with CMS

Development of a new vector boson tagging algorithm

Up to 30% improvement in search sensitivity

Abstract

This article summarises three searches for diboson resonances in the all-hadronic final state using data collected at a center-of-mass energy of $\sqrt{\rm{s}}=13$ TeV with the CMS experiment at the CERN LHC. The boson decay products are contained in one large-radius jet, resulting in dijet final states which are resolved using jet substructure techniques. The analyses presented use 2.3, 35.9 and 77.3 inverse femtobarns of data collected between 2015 and 2017. These include the first search for diboson resonances using data collected at a 13 TeV collision energy, the introduction of a new algorithm to tag vector bosons in the context of analyzing the data collected in 2016, and the development of a novel multidimensional fit improving on the sensitivity of the previous search method with up to $30\%$. The results presented here are the most sensitive to date of diboson resonance searches in the dijet final state. An emphasis on improvements in technique for vector boson tagging is made.