Phys. Rev. Lett. 83, 41–44 (1999)

Limits on the Majorana Neutrino Mass in the 0.1 eV Range

Abstract

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L. Baudis, A. Dietz, G. Heusser, H. V. Klapdor-Kleingrothaus^*, I. V. Krivosheina^†, St. Kolb, B. Majorovits, V. F. Melnikov^‡, H. Päs, F. Schwamm, and H. Strecker
Max-Planck-Institut für Kernphysik, P.O. Box 10 39 80, D-69029 Heidelberg, Germany

V. Alexeev, A. Balysh, A. Bakalyarov, S. T. Belyaev^§, V. I. Lebedev, and S. Zhukov
Russian Science Centre, Kurchatov Institute, 123 182 Moscow, Russia

Received 26 January 1999; published in the issue dated 5 July 1999

The Heidelberg-Moscow experiment gives the most stringent limit on the Majorana neutrino mass. After 24 kg yr of data with pulse shape measurements, we set a lower limit on the half-life of the 0νββ decay in ⁷⁶Ge of T_1/2^0ν≥5.7×10²⁵yr at 90% C.L. (after PDG98 [C. Caso et al., Eur. Phys. J. C3, 1 (1998]), the sensitivity of the experiment being T_1/2^0ν≥1.6×10²⁵yr at 90% C.L. We thus exclude an effective Majorana neutrino mass greater than 0.2 eV (0.39 eV sensitivity), using the matrix elements of A. Staudt, K. Muto, and H. V. Klapdor-Kleingrothaus, Europhys. Lett. 13, 31 (1990). This limit sets strong constraints on degenerate neutrino mass models.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.83.41

DOI:

10.1103/PhysRevLett.83.41

PACS:

14.60.Pq, 23.40.Bw

^*Author to whom correspondence should be addressed.

^†On leave from the Radiophysical Research Institute (NIRFI), Nishnij Novgorod, Russia.

^‡

^§

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Phys. Rev. Lett. 83, 41–44 (1999)

Limits on the Majorana Neutrino Mass in the 0.1 eV Range

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