## [astro-ph/0512454] Dark matter from encapsulated atoms

 Authors: C.D. Froggatt, H.B. Nielsen Abstract: We propose that dark matter consists of collections of atoms encapsulated inside pieces of an alternative vacuum, in which the Higgs field vacuum expectation value is appreciably smaller than in the usual vacuum. The alternative vacuum is supposed to have the same energy density as our own. Apart from this degeneracy of vacuum phases, we do not introduce any new physics beyond the Standard Model. The dark matter balls are estimated to have a radius of order 20 cm and a mass of order $10^{11}$ kg. However they are very difficult to observe directly, but inside dense stars may expand eating up the star and cause huge explosions (gamma ray bursts). The ratio of dark matter to ordinary baryonic matter is estimated to be of the order of the ratio of the binding energy per nucleon in helium to the difference between the binding energies per nucleon in heavy nuclei and in helium. Thus we predict approximately five times as much dark matter as ordinary baryonic matter! [PDF]  [PS]  [BibTex]  [Bookmark]

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Tommy Anderberg
Posts: 47
Joined: November 24 2005
Affiliation: independent

### [astro-ph/0512454] Dark matter from encapsulated atoms

A dark matter proposal which stands out from the crowd by not invoking physics beyond the standard model. It does require a conjectured 6t+6tbar bound state to exist, but that's certainly a smaller assumption than a whole new matter sector. That's the spirit!