# Search for t t-bar resonances in highly boosted lepton+jets and fully hadronic final states in proton-proton collisions at sqrt(s) = 13 TeV

## TL;DR

This paper searches for heavy resonances decaying into top quark pairs in proton-proton collisions at 13 TeV, using boosted top techniques in lepton+jets and fully hadronic channels, setting new exclusion limits above 2 TeV.

## Contribution

It introduces an optimized analysis for massive, boosted top quarks and improves exclusion limits for resonances above 2 TeV at 13 TeV collision energy.

## Key findings

- No evidence for resonant t t-bar production was observed.
- Upper limits on production cross sections were established.
- Exclusion limits above 2 TeV are significantly improved.

## Abstract

A search for the production of heavy resonances decaying into top quark-antiquark pairs is presented. The analysis is performed in the lepton+jets and fully hadronic channels using data collected in proton-proton collisions at sqrt(s) = 13 TeV using the CMS detector at the LHC, corresponding to an integrated luminosity of 2.6 inverse femtobarns. The selection is optimized for massive resonances, where the top quarks have large Lorentz boosts. No evidence for resonant t t-bar production is found in the data, and upper limits on the production cross section of heavy resonances are set. The exclusion limits for resonances with masses above 2 TeV are significantly improved compared to those of previous analyses at sqrt(s) = 8 TeV.