Directional Search for Isospin-Violating Dark Matter with Nuclear Emulsion

TL;DR

This paper explores the potential of nuclear emulsion detectors with directional sensitivity to test isospin-violating dark matter models and clarify the origin of annual modulation signals observed in direct detection experiments.

Contribution

It proposes using nuclear emulsion detectors to investigate isospin-violating dark matter, offering a novel approach to distinguish dark matter signals from background through directional detection.

Findings

Nuclear emulsion detectors can potentially identify dark matter-induced signals.

Directional sensitivity helps differentiate dark matter signals from background.

The method can test favored parameter regions of isospin-violating dark matter models.

Abstract

Some of direct dark matter searches reported not only positive signals but also annual modulation of the signal event. However, the parameter spaces have been excluded by other experiments. Isospin violating dark matter solves the contradiction by supposing different coupling to proton and neutron. We study the possibility to test the favored parameter region by isospin violating dark matter model with the future detector of dark matter using the nuclear emulsion. Since the nuclear emulsion detector has directional sensitivity, the detector is expected to examine whether the annual modulations observed other experiments is caused by dark matter or background signals.