Searches for new physics below twice the electron mass with GERDA

GERDA Collaboration; Agostini, M.; Alexander, A.; Araujo, G.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Biancacci, V.; Bossio, E.; Bothe, V.; Brugnera, R.; Caldwell, A.; Calgaro, S.; Cattadori, C.; Chernogorov, A.; Chiu, P.-J.; Comellato, T.; D’Andrea, V.; Demidova, E. V.; Di Marco, N.; Doroshkevich, E.; Fomina, M.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hemmer, S.; Hofmann, W.; Huang, J.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kermaïdic, Y.; Khushbakht, H.; Kihm, T.; Kilgus, K.; Kirpichnikov, I. V.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Krause, P.; Kuzminov, V. V.; Laubenstein, M.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Marshall, G.; Misiaszek, M.; Morella, M.; Müller, Y.; Nemchenok, I.; Neuberger, M.; Pandola, L.; Pelczar, K.; Pertoldi, L.; Piseri, P.; Pullia, A.; Ransom, C.; Rauscher, L.; Redchuk, M.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Sailer, S.; Salamida, F.; Schönert, S.; Schreiner, J.; Schütz, A-K.; Schulz, O.; Schwarz, M.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Shtembari, L.; Simgen, H.; Smolnikov, A.; Stukov, D.; Sullivan, S.; 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.; Zuber, K.; Zuzel, G.

doi:10.1140/epjc/s10052-024-13020-0

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Searches for new physics below twice the electron mass with GERDA

MPS-Authors

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Bauer, C.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Bothe, V.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons291900

Gangapshev, A.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons54359

Hakenmüller, J.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30605

Hofmann, W.
Prof. Werner Hofmann, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons199652

Kermaïdic, Y.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30675

Kihm, T.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons37597

Klimenko, A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30768

Lindner, M.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30794

Maneschg, W.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons197757

Sailer, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31012

Schreiner, J.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31027

Schwingenheuer, B.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31050

Simgen, H.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31061

Smolnikov, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Sullivan, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

GERDA Collaboration, Agostini, M., Alexander, A., Araujo, G., Bakalyarov, A. M., Balata, M., et al. (2024). Searches for new physics below twice the electron mass with GERDA. The European Physical Journal C, 84: 940. doi:10.1140/epjc/s10052-024-13020-0.

Cite as: https://hdl.handle.net/21.11116/0000-000F-DFB0-F

Abstract

A search for full energy depositions from bosonic keV-scale dark matter candidates of masses between 65 and 1021 keV has been performed with data collected during Phase II of the GERmanium Detector Array (Gerda) exper- iment. Our analysis includes direct dark matter absorption as well as dark Compton scattering. With a total exposure of 105.5 kg years, no evidence for a signal above the back- ground has been observed. The resulting exclusion limits deduced with either Bayesian or Frequentist statistics are the most stringent direct constraints in the major part of the 140–1021 keV mass range. As an example, at a mass of 150 keV the dimensionless coupling of dark photons and axion-like particles to electrons has been constrained to α′/α < 8.7 × 10⁻²⁴ and g_ae < 3.3 × 10⁻¹² at 90% credible interval (CI), respectively. Additionally, a search for peak-like signals from beyond the Standard Model decays of nucleons and electrons is performed. We find for the inclusive decay of a single neutron in ⁷⁶Ge a lower lifetime limit of τ_n > 1.5 × 10²⁴ years and for a proton τ_p > 1.3 × 10²⁴ years at 90% CI. For the electron decay e^- → ν_eγ a lower limit of τ_e > 5.4 × 10²⁵ years at 90% CI has been determined.