论文标题
暗物质通过与中性水强度映射的伽玛射线的互相关进行搜索
Dark Matter searches through cross-correlations of gamma rays with neutral-hydrogen intensity mapping
论文作者
论文摘要
In this work we derive the first theoretical prediction of the cross-correlation signal between the unresolved gamma-ray background and the 21-cm line originated by the spin-flip transition of neutral hydrogen atoms, by taking as benchmark experiment the space telescope {\it Fermi}-LAT for gamma rays and the next-generation radio telescope Square Kilometer Array (SKA) as well as its precursor Meerkat进行21厘米排放。黑物质（DM）参数空间中可实现的界限已经与组合{\ it fermi} -lat $ \ times $ meerkat具有竞争力，但是SKA将允许更深入并探测一个热量DM粒子，达到130 GEV的质量。未来的伽马射线检测器，具有更好的角度分辨率和更大的接触量，以及未分级的射电望远镜，将有潜力探测具有热歼灭横截面的DM候选者，并将其质量提高到TEV量表。
In this work we derive the first theoretical prediction of the cross-correlation signal between the unresolved gamma-ray background and the 21-cm line originated by the spin-flip transition of neutral hydrogen atoms, by taking as benchmark experiment the space telescope {\it Fermi}-LAT for gamma rays and the next-generation radio telescope Square Kilometer Array (SKA) as well as its precursor MeerKAT for the 21-cm emission. The attainable bounds in the dark matter (DM) parameter space are envisioned to be competitive already with the combination {\it Fermi}-LAT $\times$ MeerKAT, but SKA will allow to go deeper and probe a thermal DM particle up to masses of 130 GeV. A future gamma-ray detector with better angular resolution and larger exposure together with an ungraded radio telescope will have the potentiality to probe a DM candidate with thermal annihilation cross-section and masses up to the TeV scale.
