# Search for new physics with dijet angular distributions in proton-proton collisions at sqrt(s) = 13 TeV

## TL;DR

This paper reports a search for new physics phenomena such as extra dimensions, black holes, and quark contact interactions using dijet angular distributions in proton-proton collisions at 13 TeV, setting new limits on various models.

## Contribution

It provides the first limits on quark contact interactions, quantum black holes, and extra dimensions using dijet angular distributions at 13 TeV with the CMS detector.

## Key findings

- Quark contact interactions are excluded up to 11.5 or 14.7 TeV.
- Quantum black holes are excluded below 7.8 or 5.3 TeV.
- Limits on virtual graviton exchange range from 7.9 to 11.2 TeV.

## Abstract

A search is presented for extra spatial dimensions, quantum black holes, and quark contact interactions in measurements of dijet angular distributions in proton-proton collisions at sqrt(s) = 13 TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 2.6 inverse femtobarns. The distributions are found to be in agreement with predictions from perturbative quantum chromodynamics that include electroweak corrections. Limits for different contact interaction models are obtained in a benchmark model, valid to next-to-leading order in QCD, in which only left-handed quarks participate, quark contact interactions are excluded up to a scale of 11.5 or 14.7 TeV for destructive or constructive interference, respectively. The production of quantum black holes is excluded for masses below 7.8 or 5.3 TeV, depending on the model. The lower limits for the scales of virtual graviton exchange in the Arkani-Hamed--Dimopoulos--Dvali model of extra spatial dimensions are in the range 7.9-11.2 TeV, and are the most stringent set of limits available.