The first search for bosonic super-WIMPs with masses up to 1 MeV/c$^2$ with GERDA
Creators: name: GERDA Collaboration
name: Agostini, M.
name: Bakalyarov, A. M.
name: Balata, M.
name: Barabanov, I.
name: Baudis, L.
name: Bauer, C.
name: Bellotti, E.
name: Belogurov, S.
name: Bettini, A.
name: Bezrukov, L.
name: Borowicz, D.
name: Bossio, E.
name: Bothe, V.
name: Brudanin, V.
name: Brugnera, R.
name: Caldwell, A.
name: Cattadori, C.
name: Chernogorov, A.
name: Comellato, T.
name: D'Andrea, V.
name: Demidova, E. V.
name: Di Marco, N.
name: Doroshkevich, E.
name: Egorov, V.
name: Fischer, F.
name: Fomina, M.
name: Gangapshev, A.
name: Garfagnini, A.
name: Gooch, C.
name: Grabmayr, P.
name: Gurentsov, V.
name: Gusev, K.
name: Hakenmüller, J.
name: Hemmer, S.
name: Hiller, R.
name: Hofmann, W.
name: Hult, M.
name: Inzhechik, L. V.
name: Csáthy, J. Janicskó
name: Jochum, J.
name: Junker, M.
name: Kazalov, V.
name: Kermaïdic, Y.
name: Khushbakht, H.
name: Kihm, T.
name: Kirpichnikov, I. V.
name: Klimenko, A.
name: Kneißl, R.
name: Knöpfle, K. T.
name: Kochetov, O.
name: Kornoukhov, V. N.
name: Krause, P.
name: Kuzminov, V. V.
name: Laubenstein, M.
name: Lazzaro, A.
name: Lindner, M.
name: Lippi, I.
name: Lubashevskiy, A.
name: Lubsandorzhiev, B.
name: Lutter, G.
name: Macolino, C.
name: Majorovits, B.
name: Maneschg, W.
name: Miloradovic, M.
name: Mingazheva, R.
name: Misiaszek, M.
name: Moseev, P.
name: Nemchenok, I.
name: Panas, K.
name: Pandola, L.
name: Pelczar, K.
name: Pertoldi, L.
name: Piseri, P.
name: Pullia, A.
name: Ransom, C.
name: Rauscher, L.
name: Riboldi, S.
name: Rumyantseva, N.
name: Sada, C.
name: Salamida, F.
name: Schönert, S.
name: Schreiner, J.
name: Schütt, M.
name: Schütz, A-K.
name: Schulz, O.
name: Schwarz, M.
name: Schwingenheuer, B.
name: Selivanenko, O.
name: Shevchik, E.
name: Shirchenko, M.
name: Simgen, H.
name: Smolnikov, A.
name: Stukov, D.
name: Vasenko, A. A.
name: Veresnikova, A.
name: Vignoli, C.
name: von Sturm, K.
name: Wester, T.
name: Wiesinger, C.
name: Wojcik, M.
name: Yanovich, E.
name: Zatschler, B.
name: Zhitnikov, I.
name: Zhukov, S. V.
name: Zinatulina, D.
name: Zschocke, A.
name: Zsigmond, A. J.
name: Zuzel, K. Zuber G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the first search for bosonic super-WIMPs as keV-scale dark matter candidates performed with the GERDA experiment. GERDA is a neutrinoless double-beta decay experiment which operates high-purity germanium detectors enriched in $^{76}$Ge in an ultra-low 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 axion-like particles and dark photons to electrons of $g_{ae} &lt; 3 \cdot 10^{-12}$ and ${α'}/α &lt; 6.5 \cdot 10^{-24}$ at 90% credible interval, respectively, were obtained.
description: 6 pages, 3 figures, submitted to Physical Review Letters, added list of authors, updated ref. [21]