# Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at sqrt(s) = 13 TeV

## TL;DR

This study searches for new physics phenomena in all-hadronic final states using the MT2 variable in proton-proton collisions at 13 TeV, setting exclusion limits on supersymmetric particle masses with no observed excess.

## Contribution

It introduces a search method using the MT2 variable in all-hadronic events and provides new exclusion limits on supersymmetric particle masses at 13 TeV.

## Key findings

- No excess events observed over the standard model background.
- Exclusion limits up to 2025 GeV for gluino masses.
- Mass limits up to 1175 GeV for bottom squarks.

## Abstract

A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the MT2 variable. The results are based on a sample of proton-proton collisions collected in 2016 at a center-of-mass energy of 13 TeV with the CMS detector and corresponding to an integrated luminosity of 35.9 inverse femtobarns. No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeV. Mass limits as high as 1070 (1175) GeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions.