Roszkowski Leszek, Seto Osamu
Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom.
Phys Rev Lett. 2007 Apr 20;98(16):161304. doi: 10.1103/PhysRevLett.98.161304. Epub 2007 Apr 19.
We show that the Omega b-Omega DM coincidence can naturally be explained in a framework where axino is cold dark matter which is predominantly produced in nonthermal processes involving decays of Q-balls formed in Affleck-Dine baryogenesis. In this approach, the similarity of Omega b and Omega DM is a direct consequence of the (sub-)GeV scale of the mass of the axino, while the reheating temperature TR must be low, some 10(2) GeV, or less.
我们表明，在一个框架中，欧米伽b与暗物质密度（ΩDM）的巧合可以自然地得到解释，在这个框架中，轴微子是冷暗物质，它主要在非热过程中产生，这些过程涉及在Affleck-Dine重子生成中形成的Q球的衰变。在这种方法中，欧米伽b和ΩDM的相似性是轴微子质量（亚）GeV尺度的直接结果，而再加热温度TR必须很低，约为10²GeV或更低。
