Although it is usually thought that a class of weakly interacting massive particle (WIMP) dark matters (DMs), which have the vector coupling with the Z boson, is denied by null results of the direct DM searches, such WIMP DMs are still viable if they are superheavy with the mass of $m_{DM}\gtrsim {10}^9$ GeV. In the future, the superheavy WIMP DMs can be searched up to $m_{DM}\simeq {10}^{12}$ GeV, which corresponds to the so-called neutrino floor limit. We show that the observed abundance of ${\mathrm{\Omega }}_{\text{DM}}{h}^2\simeq 0.1$ for a superheavy WIMP DM can be reproduced by a suitable reheating temperature of $T_R\simeq m_{DM}/29$ after inflation, if the direct inflaton decay into DM is negligible or kinematically forbidden.

虽然通常认为一类弱相互作用大质量粒子 (WIMP) 暗物质 (DMs) 与Z玻色子具有矢量耦合，但直接 DM 搜索的空结果否定了这种 WIMP DMs，如果它们的质量超重${米}_{D米}\gtrsim {10}^9$伏特。未来，超重 WIMP DM 可以搜索到${米}_{D米}\simeq {10}^{12}$GeV，对应于所谓的中微子底限。我们表明，观察到的丰度${\mathrm{\Omega }}_{\text{DM}}{H}^2\simeq 0.1$ 对于超重 WIMP DM 可以通过合适的再加热温度复制 ${吨}_{\mathrm{电阻}}\simeq {米}_{D米}/29$ 暴胀后，如果直接暴胀子衰减为 DM 可以忽略不计或在运动学上被禁止。