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arXiv 1504.00745hep-ph
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通过Z '-门户与SIMP暗介子通信

Communication with SIMP dark mesons via Z'-portal

Hyun Min Lee, Min-Seok Seo

摘要:

考虑了含有暗介子的SIMP模型的一个相容的推广,即引入暗U(1)_D规范对称性.暗物质密度是由$3\to2$自湮灭过程的热冻结决定的,这要归功于Wess-Zumino-Witten项。在该SIMP方案中,当暗光子与SM超荷规范玻色子之间存在规范动力学混合时,暗介子可以充分地散射出标准模型粒子,并保持动力学平衡直至冻结.以SU(N_c)约束群下的SU(N_f)× SU(N_f)/SU(N_f)味对称性为例,说明了SIMP对暗光子参数的约束对目前暗光子的实验研究有多大的互补性。

英文摘要:

We consider a consistent extension of the SIMP models with dark mesons by including a dark U(1)_D gauge symmetry. Dark matter density is determined by a thermal freeze-out of the $3\to2$ self-annihilation process, thanks to the Wess-Zumino-Witten term. In the presence of a gauge kinetic mixing between the dark photon and the SM hypercharge gauge boson, dark mesons can undergo a sufficient scattering off the Standard Model particles and keep in kinetic equilibrium until freeze-out in this SIMP scenario. Taking the SU(N_f)xSU(N_f)/SU(N_f) flavor symmetry under the SU(N_c) confining group, we show how much complementary the SIMP constraints on the parameters of the dark photon are for current experimental searches for dark photon.

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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