@inproceedings{5cfa85ae320c41bb9da13910d688bec3,
title = "Dark matter constraints from a cosmic refractive index",
abstract = "The dark-matter candidates of particle physics invariably possess electromagnetic interactions, if only at loop level. Light, in passing through dark matter, can thus exhibit frequencydependent effects, exhibiting a refractive index which deviates from its vacuum value. Its real part gives dispersive effects in propagation: such are signalled through systematic, frequency-dependent time delays in the observed light curves of cosmologically distant gamma-ray bursts. We review the theoretical framework for their analysis and use observations of gamma-ray-burst radio afterglows to set a direct limit on the electric-charge-to-mass ratio of dark matter.",
keywords = "Dark matter, Gamma ray bursts, Radio afterglows",
author = "Susan Gardner and Latimer, \{David C.\}",
year = "2009",
doi = "10.1063/1.3293792",
language = "English",
isbn = "9780735407237",
series = "AIP Conference Proceedings",
pages = "248--251",
booktitle = "Intersections of Particle and Nuclear Physics - Proceedings of the 10th International Conference",
note = "10th International Conference on Intersections of Particle and Nuclear Physics ; Conference date: 26-05-2009 Through 31-05-2009",
}