# Search for new physics in the monophoton final state in proton-proton collisions at sqrt(s) = 13 TeV

## TL;DR

This paper reports a search for new physics involving a photon and missing energy in proton-proton collisions at 13 TeV, setting new exclusion limits on dark matter and extra dimensions.

## Contribution

It provides the most stringent limits to date on models with extra spatial dimensions using the monophoton final state at the LHC.

## Key findings

- No deviations from the standard model observed.
- New exclusion limits on dark matter production cross sections.
- Most stringent limits to date on extra dimension models.

## Abstract

A search is conducted for new physics in a final state containing a photon and missing transverse momentum in proton-proton collisions at sqrt(s) = 13 TeV. The data collected by the CMS experiment at the CERN LHC correspond to an integrated luminosity of 12.9 inverse femtobarns. No deviations are observed relative to the predictions of the standard model. The results are interpreted as exclusion limits on the dark matter production cross sections and parameters in models containing extra spatial dimensions. Improved limits are set with respect to previous searches using the monophoton final state. In particular, the limits on the extra dimension model parameters are the most stringent to date in this channel.