Is Self-Interacting Dark Matter Undergoing Dark Fusion?
Is Self-Interacting Dark Matter Undergoing Dark Fusion?
复制标题
自相互作用暗物质正在经历暗聚变吗？
DOI：
10.1103/physrevlett.120.221806
复制
发表时间：
2017
影响因子：
8.6
通讯作者：
Samuel D. McDermott
中科院分区：
文献类型：
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作者：
Samuel D. McDermott
我们认为，二对二暗物质聚变可能是解决冷无碰撞暗物质范式的小尺度结构问题的弛豫过程。为了使融合截面能够正确地缩放从矮星系到星系团的数十年天体物理质量，我们要求释放的分数结合能大于 v^{n}∼(10^{-(2-3)})^{n}，其中 n=1, 2 取决于局部暗区化学。暗区相互作用横截面的大小必须为 σ∼0.1-1 barn，比标准模型氘核聚变稍大，表明暗核尺度为 Λ∼O(100 MeV)。暗聚变坚定地预测常数 σv 低于星系团的特征速度。对速度色散为每秒数百公里的星系团内部结构的观测（其中少数已被识别）可以将暗聚变与暗光子模型区分开来。
We suggest that two-to-two dark matter fusion may be the relaxation process that resolves the small-scale structure problems of the cold collisionless dark matter paradigm. In order for the fusion cross section to scale correctly across many decades of astrophysical masses from dwarf galaxies to galaxy clusters, we require the fractional binding energy released to be greater than v^{n}∼(10^{-(2-3)})^{n}, where n=1, 2 depends on local dark sector chemistry. The size of the dark-sector interaction cross sections must be σ∼0.1-1 barn, moderately larger than for standard model deuteron fusion, indicating a dark nuclear scale Λ∼O(100 MeV). Dark fusion firmly predicts constant σv below the characteristic velocities of galaxy clusters. Observations of the inner structure of galaxy groups with velocity dispersion of several hundred kilometers per second, of which a handful have been identified, could differentiate dark fusion from a dark photon model.
影响因子：
5.4
作者：
Edward Hardy;R. Lasenby;J. March-Russell;S. West
通讯作者：
Edward Hardy;R. Lasenby;J. March-Russell;S. West