/ Experiment-HEP arXiv:0810.0248

Measurement of the Double Beta Decay Half-life of Nd-150 and Search for Neutrinoless Decay Modes with the NEMO-3 Detector

Argyriades, J. (Orsay, LAL) ; Arnold, R. (Louis Pasteur U., Strasbourg I) ; Augier, C. (Orsay, LAL) ; Baker, J. (Idaho Natl. Lab.) ; Barabash, A.S. (Moscow, ITEP) ; Bongrand, M. (Orsay, LAL) ; Broudin, G. (CENBG, Gradignan) ; Brudanin, V. (Dubna, JINR) ; Caffrey, A.J. (Idaho Natl. Lab.) ; Chauveau, E. (CENBG, Gradignan) ; Daraktchieva, Z. (University Coll. London) ; Egorov, V. (Dubna, JINR) ; Fatemi-Ghomi, N. (Manchester U.) ; Flack, R. (University Coll. London) ; Hubert, Ph. (CENBG, Gradignan) ; Jerie, J. (IEAP CTU, Prague) ; Jullian, S. (Orsay, LAL) ; Kauer, M. (University Coll. London) ; King, S. (University Coll. London) ; Klimenko, A. (Dubna, JINR) ; Kochetov, O. (Dubna, JINR) ; Konovalov, S.I. (Moscow, ITEP) ; Kovalenko, V. (Dubna, JINR) ; Lalanne, D. (Orsay, LAL) ; Lamhamdi, T. (USMBA, Fes) ; Lang, K. (Texas U.) ; Lemiere, Y. (ENSICAEN) ; Longuemare, C. (ENSICAEN) ; Lutter, G. (CENBG, Gradignan) ; Marquet, Ch. (CENBG, Gradignan) ; Martin-Albo, J. (Valencia U., IFIC) ; Mauger, F. (ENSICAEN) ; Nachab, A. (CENBG, Gradignan) ; Nasteva, Irina (Manchester U.) ; Nemchenok, I. (Dubna, JINR) ; Nova, F. (Barcelona, Autonoma U.) ; Novella, P. (Valencia U., IFIC) ; Ohsumi, H. (Saga U., Japan) ; Pahlka, R.B. (Texas U.) ; Perrot, F. (CENBG, Gradignan) ; Piquemal, F. (CENBG, Gradignan) ; Reyss, J.L. (LSCE, Gif-sur-Yvette) ; Ricol, J.S. (CENBG, Gradignan) ; Saakyan, R. (University Coll. London) ; Sarazin, X. (Orsay, LAL) ; Simard, L. (Orsay, LAL) ; Simkovic, F. (Comenius U.) ; Shitov, Yu. (Dubna, JINR) ; Smolnikov, A. (Dubna, JINR) ; Snow, S. (Manchester U.) ; Soldner-Rembold, S. (Manchester U.) ; Stekl, I. (IEAP CTU, Prague) ; Suhonen, J. (Jyvaskyla U.) ; Sutton, C.S. (Mt. Holyoke Coll.) ; Szklarz, G. (Orsay, LAL) ; Thomas, J. (University Coll. London) ; Timkin, V. (Dubna, JINR) ; Tretyak, V. (Dubna, JINR) ; Umatov, V. (Bordeaux U.) ; Vala, L. (IEAP CTU, Prague) ; Vanyushin, I. (Moscow, ITEP) ; Vasiliev, V. (University Coll. London) ; Vorobel, V. (Charles U.) ; Vylov, Ts. (Dubna, JINR)

Published in: Phys.Rev.
Year: 2009
Vol.: C80
Page No: 032501
Pages: 5

Abstract: The half-life for double beta decay of 150-Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150-Nd the half-life for 2nubb decay is measured to be T_1/2^2nu = (9.11+0.25_-0.22}(stat.) +- 0.63 (syst.)) x 10^18 years. The observed limit on the half-life for neutrinoless double beta decay is found to be T_1/2^{0nu} > 1.8 x 10^22 years at 90 % Confidence Level. This translates into a limit on the effective Majorana neutrino mass of <m_{neutrino}><4.0-6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents and transitions to excited states.

Web-Page: http://inspirebeta.net/record/798218/files/0nbbsignal.png; http://inspirebeta.net/record/798218/files/1e_paper_log.png; http://inspirebeta.net/record/798218/files/bbcostheta.png; http://inspirebeta.net/record/798218/files/bbesum.png; http://inspirebeta.net/record/798218/files/eelectron_1e1g_paper.png; http://inspirebeta.net/record/798218/files/egamma_1e1g_paper_log.png

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