Abstract
We summarize the effects of Dark Matter-photon interactions on structure formation and discuss the shape of the CMB and matter power spectra in presence of such interactions. We find that cross sections of the order of \( {{10}^{{ - 33}}}\left( {\frac{{{{m}_{{dm}}}}}{{GeV}}} \right)c{{m}^{2}} \), corresponding to collisional Warm Dark Matter particles, do not seem to be excluded yet and could even provide a quite interesting alternative to Cold Dark Matter scenarios if the discrepancy between numerical simulations and observations at small scales remained.
assuming a symmetry between the number of particles and anti-particles
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Boehm, C. (2002). Dark Matter-Photon Interactions: Are They Allowed?. In: Klapdor-Kleingrothaus, H.V., Viollier, R.D. (eds) Dark Matter in Astro- and Particle Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-55739-2_34
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DOI: https://doi.org/10.1007/978-3-642-55739-2_34
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