Agostini M, Bakalyarov A M, Balata M, Barabanov I, Baudis L, Bauer C, Bellotti E, Belogurov S, Bettini A, Bezrukov L, Borowicz D, Bossio E, Bothe V, Brudanin V, Brugnera R, Caldwell A, Cattadori C, Chernogorov A, Comellato T, D'Andrea V, Demidova E V, Di Marco N, Doroshkevich E, Egorov V, Fischer F, Fomina M, Gangapshev A, Garfagnini A, Gooch C, Grabmayr P, Gurentsov V, Gusev K, Hakenmüller J, Hemmer S, Hiller R, Hofmann W, Hult M, Inzhechik L V, Janicskó Csáthy J, Jochum J, Junker M, Kazalov V, Kermaïdic Y, Khushbakht H, Kihm T, Kirpichnikov I V, Klimenko A, Kneißl R, Knöpfle K T, Kochetov O, Kornoukhov V N, Krause P, Kuzminov V V, Laubenstein M, Lazzaro A, Lindner M, Lippi I, Lubashevskiy A, Lubsandorzhiev B, Lutter G, Macolino C, Majorovits B, Maneschg W, Miloradovic M, Mingazheva R, Misiaszek M, Moseev P, Nemchenok I, Panas K, Pandola L, Pelczar K, Pertoldi L, Piseri P, Pullia A, Ransom C, Rauscher L, Riboldi S, Rumyantseva N, Sada C, Salamida F, Schönert S, Schreiner J, Schütt M, Schütz A-K, Schulz O, Schwarz M, Schwingenheuer B, Selivanenko O, Shevchik E, Shirchenko M, Simgen H, Smolnikov A, Stukov D, Vasenko A A, Veresnikova A, Vignoli C, von Sturm K, Wester T, Wiesinger C, Wojcik M, Yanovich E, Zatschler B, Zhitnikov I, Zhukov S V, Zinatulina D, Zschocke A, Zsigmond A J, Zuber K, Zuzel G
Physik Department, Technische Universität München, 85748 München, Germany.
National Research Centre "Kurchatov Institute," 123182 Moscow, Russia.
Phys Rev Lett. 2020 Jul 3;125(1):011801. doi: 10.1103/PhysRevLett.125.011801.
We present the first search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates performed with the GERDA experiment. GERDA is a neutrinoless double-β decay experiment which operates high-purity germanium detectors enriched in ^{76}Ge in an ultralow background environment at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy. Searches were performed for pseudoscalar and vector particles in the mass region from 60 keV/c^{2} to 1 MeV/c^{2}. No evidence for a dark matter signal was observed, and the most stringent constraints on the couplings of super-WIMPs with masses above 120 keV/c^{2} have been set. As an example, at a mass of 150 keV/c^{2} the most stringent direct limits on the dimensionless couplings of axionlike particles and dark photons to electrons of g_{ae}<3×10^{-12} and α^{'}/α<6.5×10^{-24} at 90% credible interval, respectively, were obtained.
我们展示了首次利用GERDA实验对作为keV尺度暗物质候选者的玻色子超弱相互作用大质量粒子（超弱相互作用大质量粒子）进行的搜寻。GERDA是一项无中微子双β衰变实验，在意大利国家核物理研究所大萨索国家实验室（LNGS）的超低本底环境中运行富含(^{76}Ge)的高纯锗探测器。在60 keV/c²至1 MeV/c²的质量区域内对赝标量和矢量粒子进行了搜寻。未观察到暗物质信号的证据，并且对质量高于120 keV/c²的超弱相互作用大质量粒子的耦合设定了最严格的限制。例如，在质量为150 keV/c²时，分别在90%可信区间获得了对类轴子粒子和暗光子与电子的无量纲耦合的最严格直接限制，即(g_{ae}<3×10^{-12})和(α^{'}/α<6.5×10^{-24})。
