Kasuya S, Kawasaki M
Research Center for the Early Universe, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
Phys Rev Lett. 2000 Sep 25;85(13):2677-80. doi: 10.1103/PhysRevLett.85.2677.
We obtain a new type of a stable Q ball in the context of gauge-mediated supersymmetry breaking in the minimal supersymmetric standard model. It is a so-called gravity-mediation type of Q ball, but stable against the decay into nucleons, since the energy per unit charge is equal to gravitino mass m(3/2), which can be smaller than nucleon mass in the gauge-mediation mechanism. We consider the cosmological consequences in this new Q-ball scenario, and find that this new type of Q ball can be considered as the dark matter and the source for the baryon number of the universe simultaneously.
在最小超对称标准模型的规范介导超对称破缺的背景下，我们获得了一种新型的稳定Q球。它是一种所谓的引力介导型Q球，但对衰变成核子是稳定的，因为单位电荷的能量等于引力子质量m(3/2)，在规范介导机制中，该质量可以小于核子质量。我们考虑了这种新的Q球情景中的宇宙学后果，发现这种新型Q球可以同时被视为暗物质和宇宙重子数的来源。
