# Limits on WIMP-nucleon interactions with CsI(Tl) crystal detectors

## TL;DR

The KIMS experiment sets new constraints on WIMP-nucleon interactions using CsI(Tl) detectors, excluding the DAMA signal region for WIMPs over 20 GeV/c^2, and provides the most stringent limit on spin-dependent interactions for protons.

## Contribution

First to report limits on WIMP-nucleon cross section with CsI(Tl) crystals at Yangyang underground lab, excluding DAMA signal region for certain WIMP masses.

## Key findings

- Most stringent limit on spin-dependent WIMP-proton interactions.
- Exclusion of DAMA signal region for WIMP masses above 20 GeV/c^2.
- Use of 3409 kgd exposure with low background CsI(Tl) detectors.

## Abstract

The Korea Invisible Mass Search(KIMS) experiment presents new limits on WIMP-nucleon cross section using the data from an exposure of 3409 kgd taken with low background CsI(Tl) crystals at Yangyang underground laboratory. The most stringent limit on the spin dependent interaction for pure proton case is obtained. The DAMA signal region for both spin independent and spin dependent interactions for the WIMP mass higher than 20 GeV/c^2are excluded by the single experiment with crystal scintillators.