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arXiv 1306.0882hep-phastro-ph.COhep-ex
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共振湮灭的非阿贝尔暗物质

Nonabelian Dark Matter with Resonant Annihilation

Cheng-Wei Chiang, Takaaki Nomura, Jusak Tandean

摘要:

我们构造了一个基于超规范对称性SU(2)_X x U(1)_{B-L}的模型,它可以提供规范玻色子作为弱相互作用的大质量粒子暗物质.暗物质的稳定性自然由SU(2)_X的一个子群--离散的Z_2对称性来保证。暗物质通过交换规范玻色子与标准模型费米子相互作用,规范玻色子是SU(2)_X × U(1)_{B-L}规范玻色子的线性组合。只要适当地选择真空期望值自发破坏SU(2)X对称性的新标量多重态的表示,新规范玻色子质量之间的关系就能自然地导致暗物质的共振对湮灭。在探索新规范耦合的参数空间的约束条件下,从对撞机的数据和观测到的遗物密度,我们使用的结果来评估的暗物质散射核子的截面,并将其与最新的直接检测实验的数据进行比较。我们发现允许的参数区域,可以探测到未来的直接搜索暗物质和LHC搜索新粒子。

英文摘要:

We construct a model based on an extra gauge symmetry, SU(2)_X x U(1)_{B-L}, which can provide gauge bosons to serve as weakly-interacting massive particle dark matter. The stability of the dark matter is naturally guaranteed by a discrete Z_2 symmetry that is a subgroup of SU(2)_X. The dark matter interacts with standard model fermions by exchanging gauge bosons which are linear combinations of SU(2)_X x U(1)_{B-L} gauge bosons. With the appropriate choice of representation for the new scalar multiplet whose vacuum expectation value spontaneously breaks the SU(2)_X symmetry, the relation between the new gauge boson masses can naturally lead to resonant pair annihilation of the dark matter. After exploring the parameter space of the new gauge couplings subject to constraints from collider data and the observed relic density, we use the results to evaluate the cross section of the dark matter scattering off nucleons and compare it with data from the latest direct detection experiments. We find allowed parameter regions that can be probed by future direct searches for dark matter and LHC searches for new particles.

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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