论文标题
带电暗物质的重新计算
Reacceleration of charged dark matter
论文作者
论文摘要
磁性星际培养基的移动吸入性上的带电颗粒散射可以通过二阶费米加速器的过程获得能量。这种能量增益反过来耗尽了谐振波形$ k \ sim 1/r_l $周围的磁性波谱，其中$ r_l $是带电粒子的Larmor半径。这种能量转移可以禁止将磁性湍流级联到较小的尺度，从而导致扩散系数的下降，并允许在磁盘和光晕中有效地交换带电的暗物质颗粒。结果，直接检测实验的地形限制适用于带电的暗物质。加上扩散系数下降的不观察，这不包括$ 10^3 GEV \ Lessim m/q \ Lessim 10^{11} GEV $的带电暗物质，即使带电的深色物质丰度仅是总遗物丰度的一部分。
Charged particles scattering on moving inhomogenities of the magnetised interstellar medium can gain energy through the process of second-order Fermi acceleration. This energy gain depletes in turn the magnetic wave spectrum around the resonance wave-vector $k\sim 1/R_L$, where $R_L$ is the Larmor radius of the charged particle. This energy transfer can prohibit the cascading of magnetic turbulence to smaller scales, leading to a drop in the diffusion coefficient and allowing the efficient exchange of charged dark matter particles in the disk and the halo. As a result, terrestial limits from direct detection experiments apply to charged dark matter. Together with the no-observation of a drop in the diffusion coefficient, this excludes charged dark matter for $10^3 GeV\lesssim m/q \lesssim 10^{11} GeV$, even if the charged dark matter abundance is only a small part of the total relic abundance.
