Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-04-26
Commun.Theor.Phys.49:212-216,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 5 figures; v2: matches published version
Scientific paper
10.1088/0253-6102/49/1/43
In order to study the structure of neutralino star and dark galaxy, we consider dynamical interactions due to boson-exchange in the neutralino matter. Taking into account interactions of neutralinos with bosons, we derive the equation of state (EOS) of neutralino stars in terms of the relativistic mean field approach. Then we apply the resulting EOS to investigate properties of the neutralino star such as its density profile and mass limit. For example, if the neutralino mass is around 1 TeV, the Oppenheimer mass limit of the neutralino star is obtained as $6.06\times 10^{-7}M_\odot$, and the corresponding radius is about 7.8 mm. Actually, due to an increasing annihilation rate as indicated by our calculation, this dense state can never be realized in practice. Our results also show that the low density neutralino star may be a possible aggregation of the cold dark matter.
Li Xue-Qian
Ren Jie
Shen Hong
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