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arXiv 1503.00028hep-ph
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费米子希格斯门暗物质对电弱重子生成的催化作用

Catalysis of Electroweak Baryogenesis via Fermionic Higgs Portal Dark Matter

Wei Chao, Michael J. Ramsey-Musolf

摘要:

我们利用类矢量费米子增广的双Higgs偶态模型研究了费米子Higgs门暗物质对电弱重子生成的催化作用。最轻的中性费米子质量本征态提供了一个可行的暗物质候选者在稳定对称性Z_2或规范U(1)_D对称性的存在。在最低维的希格斯门暗物质相互作用中允许一个非零的CP破坏相,允许产生所观察到的暗物质遗迹密度,同时避开直接检测边界。同一相位提供了一个电弱重子发生的来源。我们表明,它是可能的,以获得观测到的可见光和暗物质的丰度,同时满足目前的电偶极矩(EDM)搜索和直接检测实验的界限。将目前的电子(中子)EDM灵敏度提高一(两)个数量级将提供对这种情况的决定性测试。

英文摘要:

We investigate catalysis of electroweak baryogenesis by fermionic Higgs portal dark matter using a two Higgs doublet model augmented by vector-like fermions. The lightest neutral fermion mass eigenstate provides a viable dark matter candidate in the presence of a stabilizing symmetry Z_2 or gauged U(1)_D symmetry. Allowing for a non-vanishing CP-violating phase in the lowest-dimension Higgs portal dark matter interactions allows generation of the observed dark matter relic density while evading direct detection bounds. The same phase provides a source for electroweak baryogenesis. We show that it is possible to obtain the observed abundances of visible and dark matter while satisfying present bounds from electric dipole moment (EDM) searches and direct detection experiments. Improving the present electron (neutron) EDM sensitivity by one (two) orders of magnitude would provide a conclusive test of this scenario.

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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