A search for Beyond the Standard Model double-/3 decay modes of 76Ge has been performed with data collected during the Phase II of the GERmanium Detector Array (GERDA) experiment, located at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Improved limits on the decays involving Majorons have been obtained, compared to previous experiments with 76Ge, with half-life values on the order of 1023 yr. For the first time with 76Ge, limits on Lorentz invariance violation effects in double-/3 decay have been obtained. The isotropic coefficient a(3) of , which embeds Lorentz violation in double-/3 decay, has been constrained at the order of 10-6 GeV. We also set the first experimental limits on the search for light exotic fermions in double-/3 decay, including sterile neutrinos.

Search for exotic physics in double-,Q decays with GERDA Phase II / M. Agostini, A. Alexander, G. Araujo, A. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, R. Brugnera, A. Caldwell, S. Calgaro, C. Cattadori, A. Chernogorov, T. Comellato, V. D'Andrea, E. Demidova, A. Di Giacinto, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmuller, S. Hemmer, W. Hofmann, J. Huang, M. Hult, L. Inzhechik, J. Csathy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaidic, H. Khushbakht, T. Kihm, K. Kilgus, I. Kirpichnikov, A. Klimenko, K. Knopfle, O. Kochetov, V. Kornoukhov, P. Krause, V. Kuzminov, M. Laubenstein, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, G. Marshall, M. Miloradovic, R. Mingazheva, M. Misiaszek, M. Morella, Y. Muller, I. Nemchenok, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, S. Sailer, F. Salamida, S. Schonert, J. Schreiner, M. Schutt, A. Schuetz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. Zhukov, D. Zinatulina, A. Zschocke, A. Zsigmond, K. Zuber, G. Zuzel. - In: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. - ISSN 1475-7516. - 2022:12(2022 Dec), pp. 012.1-012.29. [10.1088/1475-7516/2022/12/012]

Search for exotic physics in double-,Q decays with GERDA Phase II

P. Piseri;A. Pullia;S. Riboldi;
2022

Abstract

A search for Beyond the Standard Model double-/3 decay modes of 76Ge has been performed with data collected during the Phase II of the GERmanium Detector Array (GERDA) experiment, located at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Improved limits on the decays involving Majorons have been obtained, compared to previous experiments with 76Ge, with half-life values on the order of 1023 yr. For the first time with 76Ge, limits on Lorentz invariance violation effects in double-/3 decay have been obtained. The isotropic coefficient a(3) of , which embeds Lorentz violation in double-/3 decay, has been constrained at the order of 10-6 GeV. We also set the first experimental limits on the search for light exotic fermions in double-/3 decay, including sterile neutrinos.
double beta decay; neutrino properties; particle physics-cosmology connection;
Settore FIS/01 - Fisica Sperimentale
   InvisiblesPlus
   InvisiblesPlus
   European Commission
   Horizon 2020 Framework Programme
   690575

   The Elusives Enterprise: Asymmetries of the Invisible Universe
   ELUSIVES
   European Commission
   Horizon 2020 Framework Programme
   674896
dic-2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/969936
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