Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-28
Phys.Rev. D66 (2002) 063002
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages; some references added
Scientific paper
10.1103/PhysRevD.66.063002
It has been argued that the observed core density profile of galaxies is inconsistent with having a dark matter particle that is collisionless and alternative dark matter candidates which are self interacting may explain observations better. One new class of self interacting dark matter that has been proposed in the context mirror universe models of particle physics is the mirror hydrogen atom whose stability is guaranteed by the conservation of mirror baryon number. We show that the effective transport cross section for mirror hydrogen atoms, has the right order of magnitude for solving the ``cuspy'' halo problem. Furthermore, the suppression of dissipation effects for mirror atoms due to higher mirror mass scale prevents the mirror halo matter from collapsing into a disk strengthening the argument for mirror matter as galactic dark matter.
Mohapatra Rabindra N.
Nussinov Shmuel
Teplitz Vigdor L.
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