Death by Dark Matter

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Joined Aug 27, 2009
Macroscopic dark matter refers to a variety of dark matter candidates that would be expected to (elastically) scatter off of ordinary matter with a large geometric cross-section. A wide range of macro masses MX and cross-sections σX remain unprobed. We show that over a wide region within the unexplored parameter space, collisions of a macro with a human body would result in serious injury or death. We use the absence of such unexplained impacts with a well-monitored subset of the human population to exclude a region bounded by σX > 10−8 − 10−7 cm2 and MX < 50 kg. Our results open a new window on dark matter: the human body as a dark matter detector
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