Big Bang Darkleosynthesis
Big Bang Darkleosynthesis
复制标题
DOI：
10.1016/j.physletb.2015.11.001
复制
发表时间：
2014-06
影响因子：
4.4
通讯作者：
G. Krnjaic;K. Sigurdson
中科院分区：
文献类型：
--
作者：
G. Krnjaic;K. Sigurdson
在一类流行的模型中，暗物质包括一个非对称的复合粒子群，这些粒子具有来自受限的非阿贝尔规范群的短程相互作用。我们表明，耦合这个部门的一个动机良好的光介质粒子产生有效的darkleosynthesis，暗部门版本的大爆炸核合成（BBN），在参数空间的通用区域。暗物质自相互作用边界通常要求限制尺度高于Λ QCD，这通常会产生大的结合能（10 MeV/暗核子）。这些边界进一步表明介质是相对弱耦合的，因此暗扇区核之间的排斥力比标准模型核之间的库仑排斥力弱得多，这导致了标准BBN的指数势垒隧穿增强。因此，与质量数相当的可见物质相比，暗物质更容易制造，更难破坏。这个过程可以有效地产生质量显着大于限制尺度的占主导地位的态群，并且与作为基本粒子的暗物质相反，可能允许暗物质的主导形式具有高自旋（S 3/2），其发现将是暗核的确凿证据。
In a popular class of models, dark matter comprises an asymmetric population of composite particles with short range interactions arising from a confined nonabelian gauge group. We show that coupling this sector to a well-motivated light mediator particle yields efficient darkleosynthesis, a dark-sector version of big-bang nucleosynthesis (BBN), in generic regions of parameter space. Dark matter self-interaction bounds typically require the confinement scale to be above Λ QCD, which generically yields large (≫ MeV/dark-nucleon) binding energies. These bounds further suggest the mediator is relatively weakly coupled, so repulsive forces between dark-sector nuclei are much weaker than Coulomb repulsion between standard-model nuclei, which results in an exponential barrier-tunneling enhancement over standard BBN. Thus, darklei are easier to make and harder to break than visible species with comparable mass numbers. This process can efficiently yield a dominant population of states with masses significantly greater than the confinement scale and, in contrast to dark matter that is a fundamental particle, may allow the dominant form of dark matter to have high spin (S≫ 3/2), whose discovery would be smoking gun evidence for dark nuclei.