Probing Majorana neutrinos with double-β decay
M. Agostini(Technical University of Munich), A. M. Bakalyarov(Kurchatov Institute), M. Balata(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), И. Р. Барабанов(Institute for Nuclear Research), L. Baudis(University of Zurich), C. Bauer(Max Planck Institute for Nuclear Physics), E. Bellotti(Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca), S. Belogurov(Institute for Nuclear Research), A. Bettini(University of Padua), L. Bezrukov(Institute for Nuclear Research), D. Borowicz(Joint Institute for Nuclear Research), V. Brudanin(Joint Institute for Nuclear Research), R. Brugnera(University of Padua), A. Caldwell(Max Planck Institute for Physics), C. Cattadori(Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca), A. Chernogorov(Institute for Theoretical and Experimental Physics), T. Comellato(Technical University of Munich), V. D’Andrea(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), É. V. Demidova(Institute for Theoretical and Experimental Physics), N. Di Marco(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), A. Domula(Technische Universität Dresden), E. Doroshkevich(Institute for Nuclear Research), V. Egorov(Joint Institute for Nuclear Research), R. Falkenstein(University of Tübingen), M. Fomina(Joint Institute for Nuclear Research), A. M. Gangapshev(Institute for Nuclear Research), A. Garfagnini(University of Padua), Mosé Giordano(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), P. Grabmayr(University of Tübingen), V. Gurentsov(Institute for Nuclear Research), K. Gusev(Kurchatov Institute), J. Hakenmüller(Max Planck Institute for Nuclear Physics), A. Hegai(University of Tübingen), M. Heisel(Max Planck Institute for Nuclear Physics), S. Hemmer(University of Padua), R. Hiller(University of Zurich), W. Hofmann(Max Planck Institute for Nuclear Physics), M. Hult(Joint Research Center), Л. В. Инжечик(Institute for Nuclear Research), J. Janicskó Csáthy(Technical University of Munich), J. Jochum(University of Tübingen), M. Junker(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), V. V. Kazalov(Institute for Nuclear Research), Y. Kermaïdic(Max Planck Institute for Nuclear Physics), T. Kihm(Max Planck Institute for Nuclear Physics), I.V. Kirpichnikov(Institute for Theoretical and Experimental Physics), Andrea Kirsch(Max Planck Institute for Nuclear Physics), A. Kish(University of Zurich), A. Klimenko(Joint Institute for Nuclear Research), R. Kneißl(Max Planck Institute for Physics), K.T. Knöpfle(Max Planck Institute for Nuclear Physics), O. Kochetov(Joint Institute for Nuclear Research), В. Н. Корноухов(Institute for Nuclear Research), P. Krause(Technical University of Munich), V. V. Kuzminov(Institute for Nuclear Research), M. Laubenstein(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), A. Lazzaro(Technical University of Munich), M. Lindner(Max Planck Institute for Nuclear Physics), I. Lippi(University of Padua), A. Lubashevskiy(Joint Institute for Nuclear Research), Б. Лубсандоржиев(Institute for Nuclear Research), G. Lutter(Joint Research Center), C. Macolino(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), B. Majorovits(Max Planck Institute for Physics), W. Maneschg(Max Planck Institute for Nuclear Physics), M. Miloradovic(University of Zurich), R. Mingazheva(University of Zurich), M. Misiaszek(Jagiellonian University), P. Moseev(Institute for Nuclear Research), I. Nemchenok(Joint Institute for Nuclear Research), K. Panas(Jagiellonian University), L. Pandola(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud), K. Pelczar(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), L. Pertoldi(University of Padua), P. Piseri(University of Milan), A. Pullia(University of Milan), C. Ransom(University of Zurich), S. Riboldi(University of Milan), N. Rumyantseva(Kurchatov Institute), C. Sada(University of Padua), E. Sala(Max Planck Institute for Physics), F. Salamida(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), C. Schmitt(University of Tübingen), B. Schneider(Technische Universität Dresden), S. Schönert(Technical University of Munich), A.-K. Schütz(University of Tübingen), O. Schulz(Max Planck Institute for Physics), M. Schwarz(Technical University of Munich), B. Schwingenheuer(Max Planck Institute for Nuclear Physics), O. Selivanenko(Institute for Nuclear Research), E. Shevchik(Joint Institute for Nuclear Research), M. Shirchenko(Joint Institute for Nuclear Research), H. Simgen(Max Planck Institute for Nuclear Physics), A. Smolnikov(Joint Institute for Nuclear Research), L. Stančo(University of Padua), D. Stukov(Kurchatov Institute), L. Vanhoefer(Max Planck Institute for Physics), A. A. Vasenko(Institute for Theoretical and Experimental Physics), A. Veresnikova(Institute for Nuclear Research), K. von Sturm(University of Padua), V. Wagner(Max Planck Institute for Nuclear Physics), A. Wegmann(Max Planck Institute for Nuclear Physics), T. Wester(Technische Universität Dresden), Christoph Wiesinger(Technical University of Munich), M. Wójcik(Jagiellonian University), E. Yanovich(Institute for Nuclear Research), I. Zhitnikov(Joint Institute for Nuclear Research), S. V. Zhukov(Kurchatov Institute), D. Zinatulina(Joint Institute for Nuclear Research), A. Zschocke(University of Tübingen), A. J. Zsigmond(Max Planck Institute for Physics), Κ. Zuber(Technische Universität Dresden), G. Zuzel(Jagiellonian University)
Cited by 134Open Access
Abstract
Looking for an exotic decay Neutrinos—elementary fermionic particles with no electrical charge—defy the standard model of particle physics by having a tiny, but nonzero mass. One explanation for their properties is that they are Majorana fermions, which are particles equal to their antiparticles. If neutrinos were Majorana fermions, a process called neutrinoless double-β decay would become possible: an unstable nucleus could decay by turning two of its neutrons into protons with the emission of two electrons but no antineutrinos. The GERDA Collaboration searched for this decay in a particular isotope of germanium. Housed deep underground to reduce the background signal, the experiment did not detect the elusive process but did place improved boundaries on its half-life. Science , this issue p. 1445
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