8 November 2025
Northwestern University Technological Institute
America/Chicago timezone

AXIS Can Access Dark Matter Decays with the Longest Lifetimes

8 Nov 2025, 16:45
15m
Tech L211 (Northwestern University Technological Institute)

Tech L211

Northwestern University Technological Institute

2145 Sheridan Rd, Evanston, IL 60208

Speaker

Inci Karaaslan (University of Chicago (US))

Description

As one of NASA’s proposed future Astrophysics Probe missions, the Advanced X-ray Imaging Satellite (AXIS) is designed to improve on the sensitivity and spatial resolution of the Chandra X-ray Observatory. The low-background, arcsecond imaging that AXIS will deliver over a broad energy range can probe a new region of parameter space for exploring decaying dark matter candidates, such as axion-like particles (ALPs) and sterile neutrinos, via X-ray line searches. We present an initial study of AXIS’s prospects for detecting dark matter decay signals, finding potential lifetime sensitivities of order ~10^30 seconds in the keV range, surpassing current X-ray limits by several orders of magnitude.

Authors

Inci Karaaslan (University of Chicago (US)) Nimrod Shapir (University of Chicago (US))

Presentation materials