Unitarity bounds on scalar dark matter effective interactions at LHC

TL;DR

This paper examines how unitarity bounds constrain scalar dark matter effective interactions at the LHC, especially for dark matter masses around 800 GeV or heavier, highlighting the importance of these bounds in interpreting collider data.

Contribution

It provides a detailed analysis of unitarity bounds on scalar dark matter interactions at 8 TeV and 14 TeV LHC energies, emphasizing their relevance for heavy dark matter masses.

Findings

Unitarity bounds become significant for dark matter masses around 800 GeV.

Contributions violating unitarity are non-negligible for heavy dark matter.

Unitarity conditions are also evaluated for the 14 TeV LHC.

Abstract

We study the compatibility of the unitarity bound and the 8TeV LHC on the effective theory of the scalar dark matter. In several signals of effective interactions, mono-jet with missing energy events are studied. We found that, at least, if the dark matter mass is about 800GeV or heavier, contributions of events violating the unitarity are not negligible. The unitarity conditions in the 14TeV LHC are also calculated.