Arnaud Q, Armengaud E, Augier C, Benoît A, Bergé L, Billard J, Broniatowski A, Camus P, Cazes A, Chapellier M, Charlieux F, De Jésus M, Dumoulin L, Eitel K, Elkhoury E, Fillipini J-B, Filosofov D, Gascon J, Giuliani A, Gros M, Jin Y, Juillard A, Kleifges M, Lattaud H, Marnieros S, Misiak D, Navick X-F, Nones C, Olivieri E, Oriol C, Pari P, Paul B, Poda D, Rozov S, Salagnac T, Sanglard V, Siebenborn B, Vagneron L, Weber M, Yakushev E, Zolotarova A
Univ Lyon, Université Lyon 1, CNRS/IN2P3, IP2I-Lyon, F-69622 Villeurbanne, France.
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
Phys Rev Lett. 2020 Oct 2;125(14):141301. doi: 10.1103/PhysRevLett.125.141301.
We present the first Ge-based constraints on sub-MeV/c^{2} dark matter (DM) particles interacting with electrons using a 33.4 g Ge cryogenic detector with a 0.53 electron-hole pair (rms) resolution, operated underground at the Laboratoire Souterrain de Modane. Competitive constraints are set on the DM-electron scattering cross section, as well as on the kinetic mixing parameter of dark photons down to 1 eV/c^{2}. In particular, the most stringent limits are set for dark photon DM in the 6 to 9 eV/c^{2} range. These results demonstrate the high relevance of Ge cryogenic detectors for the search of DM-induced eV-scale electron signals.
我们使用一个在法国莫达讷地下实验室运行的、具有0.53电子 - 空穴对（均方根）分辨率的33.4克锗低温探测器，给出了关于与电子相互作用的亚兆电子伏特/ ( c^{2} ) 暗物质（DM）粒子的首个基于锗的限制。对暗物质 - 电子散射截面以及低至1电子伏特/ ( c^{2} ) 的暗光子的动力学混合参数设定了具有竞争力的限制。特别是，对6至9电子伏特/ ( c^{2} ) 范围内的暗光子暗物质设定了最严格的限制。这些结果证明了锗低温探测器对于寻找暗物质诱导的电子伏特尺度电子信号具有高度相关性。
