2005/08/26 by Bo Qin, Ue-Li Pen, Qin, Bo +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0508572
4 pages, no figure, submitted to PRL
arxiv created 2005/08/26 · arxiv updated 2009/12/01
Recent astronomical observations of systems of dark matter, which have been cited as providing possible support for self-interacting cold dark matter, may provide evidence for the extra dimensions predicted by superstring scenarios. We find that the properties of the required dark matter self-interaction are precisely the consequences of a world with 3 large extra dimensions of size \~1nm, where gravity follows the r-5 law at scales below ~1nm. From the cross sections measured for various dark matter systems, we also constrain the mass of dark matter particles to be mx ~ 3*10-16 proton mass, consistent with the mass of axions.