# Search for magnetic monopoles and stable high-electric-charge objects in 13 TeV proton-proton collisions with the ATLAS detector

## TL;DR

This paper reports a search for magnetic monopoles and high-electric-charge objects in 13 TeV proton-proton collisions using the ATLAS detector, setting new constraints on their production and properties.

## Contribution

It introduces a novel search method based on high ionization signatures and extends the charge range for stable objects, improving existing constraints significantly.

## Key findings

- No magnetic monopoles or high-charge objects were observed.
- Constraints on monopole production are improved by a factor of five.
- Extended charge range for stable objects to |z| ≤ 100.

## Abstract

A search for magnetic monopoles and high-electric-charge objects is presented using 34.4 fb$^{-1}$ of 13 TeV $pp$ collision data collected by the ATLAS detector at the LHC during 2015 and 2016. The considered signature is based upon high ionization in the transition radiation tracker of the inner detector associated with a pencil-shape energy deposit in the electromagnetic calorimeter. The data were collected by a dedicated trigger based on the tracker high-threshold hit capability. The results are interpreted in models of Drell-Yan pair production of stable particles with two spin hypotheses (0 and 1/2) and masses ranging from 200 GeV to 4000 GeV. The search improves by approximately a factor of five the constraints on the direct production of magnetic monopoles carrying one or two Dirac magnetic charges and stable objects with electric charge in the range $20\le|z|\le60$ and extends the charge range to $60<|z|\le100$.