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arXiv 0907.0269hep-phastro-ph.CO
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超对称暗物质Q球产生的中子星噬星体

Astrophage of neutron stars from supersymmetric dark matter Q-balls

Ian M. Shoemaker

摘要:

规范介导的超对称性破缺模型意味着稳定的非拓扑孤子(Q球)可以在早期宇宙中形成,并构成暗物质。结果表明,包括重力调解的影响设置上限的Q球的大小。当在稠密的重子环境中时,Q球会增长到这个极限大小,在这个极限大小时,它们会分裂成两个大小相等的Q球。这个Q分裂过程会迅速摧毁一颗吸收了哪怕一个Q球的中子星。对Q球暗物质的新限制要求超轻引力子m_3/2 < keV,自然避免了引力子过闭合问题,并为MSSM提供了一个引力子暗物质不可行的暗物质候选者。

英文摘要:

The gauge-mediated model of supersymmetry breaking implies that stable non-topological solitons, Q-balls, could form in the early universe and comprise the dark matter. It is shown that the inclusion of the effects from gravity-mediation set an upper limit on the size of Q-balls. When in a dense baryonic environment Q-balls grow until reaching this limiting size at which point they fragment into two equal-sized Q-balls. This Q-splitting process will rapidly destroy a neutron star that absorbs even one Q-ball. The new limits on Q-ball dark matter require an ultralight gravitino m_3/2 < keV, naturally avoiding the gravitino overclosure problem, and providing the MSSM with a dark matter candidate where gravitino dark matter is not viable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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