论文标题
扭曲的标量门户到费米金暗物质
A warped scalar portal to fermionic dark matter
论文作者
论文摘要
我们认为，SM的扩展具有扭曲的额外维度，以及新的$ \ mathbb {z} _2 $ -ODD标量singlet，不仅为层次结构问题提供了自然的解释，还为费米昂散装质量的性质和观察到的暗物质的丰富性提供了自然的解释。特别是，新的标量粒子的kaluza-klein激发，这是通过Yukawa样相互作用自然获得费米亚散装质量所需的，这可能是任何传播到大部分额外尺寸并发挥暗物质作用的费米的领先门户。此外，这种标量启示必然与希格斯玻色子混合在一起，从而导致希格斯耦合和分支比率的修改，并允许希格斯介导费米尼克暗物质的凝集。我们研究了这些效果，并在通常的冻结场景中以及在物质统治的早期发生冻结的情况下，在存在这些新的重型标量介体的情况下，在存在这些新的重型标量介体的情况下探索了费米金暗物质的生存能力。
We argue that extensions of the SM with a warped extra dimension, together with a new $\mathbb{Z}_2$-odd scalar singlet, provide a natural explanation not only for the hierarchy problem but also for the nature of fermion bulk masses and the observed dark matter relic abundance. In particular, the Kaluza-Klein excitations of the new scalar particle, which is required to naturally obtain fermion bulk masses through Yukawa-like interactions, can be the leading portal to any fermion propagating into the bulk of the extra dimension and playing the role of dark matter. Moreover, such scalar excitations will necessarily mix with the Higgs boson, leading to modifications of the Higgs couplings and branching ratios, and allowing the Higgs to mediate the coannihilation of the fermionic dark matter. We study these effects and explore the viability of fermionic dark matter in the presence of these new heavy scalar mediators both in the usual freeze-out scenario and in the case where the freeze-out happens during an early period of matter domination.
