标题： 太阳系中的暗物质 II：太阳中微子相互作用速率 显示英文标题

标题： Dark matter in the solar system II: WIMP annihilation rates in the Sun

摘要： 我们计算了弱相互作用大质量粒子（WIMPs）在太阳中的湮灭率，作为其质量和弹性散射截面的函数。湮灭的一个副产物——μ中微子，可能被下一代中微子望远镜观测到。先前对湮灭率的估计假定来自银河系暗晕的WIMPs通过与太阳核子的弹性散射被捕获后，会迅速达到太阳热平衡。我们表明，太阳对WIMPs的光学深度以及行星的引力作用都会使湮灭率低于这些估计值。尽管我们发现即将推出的千米尺度立方中微子望远镜对~100 GeV WIMPs的灵敏度几乎与先前的估计没有变化，但这些实验对~10 TeV WIMPs的灵敏度可能比标准计算所建议的低一个数量级。新的湮灭率估计值应指导未来的实验设计，并改善从中微子事件率到WIMP参数空间的映射。 显示英文摘要

摘要： We calculate the annihilation rate of weakly interacting massive particles (WIMPs) in the Sun as a function of their mass and elastic scattering cross section. One byproduct of the annihilation, muon neutrinos, may be observed by the next generation of neutrino telescopes. Previous estimates of the annihilation rate assumed that any WIMPs from the Galactic dark halo that are captured in the Sun by elastic scattering off solar nuclei quickly reach thermal equilibrium in the Sun. We show that the optical depth of the Sun to WIMPs and the gravitational forces from planets both serve to decrease the annihilation rate below these estimates. While we find that the sensitivity of upcoming km^3-scale neutrino telescopes to ~100 GeV WIMPs is virtually unchanged from previous estimates, the sensitivity of these experiments to ~10 TeV WIMPs may be an order of magnitude less than the standard calculations would suggest. The new estimates of the annihilation rates should guide future experiment design and improve the mapping from neutrino event rates to WIMP parameter space.