The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay
D. G. Phillips, E. Aguayo, F. T. Avignone, H. O. Back, A. S. Barabash, M. Bergevin, F. E. Bertrand, M. Boswell, V. Brudanin, M. Busch, Y. -D. Chan, C. D. Christ… 展开作者
D. G. Phillips, E. Aguayo, F. T. Avignone, H. O. Back, A. S. Barabash, M. Bergevin, F. E. Bertrand, M. Boswell, V. Brudanin, M. Busch, Y. -D. Chan, C. D. Christofferson, J. I. Collar, D. C. Combs, R. J. Cooper, J. A. Detwiler, P. J. Doe, Y. Efremenko, V. Egorov, H. Ejiri, S. R. Elliott, J. Esterline, J. E. Fast, N. Fields, P. Finnerty, F. M. Fraenkle, V. M. Gehman, G. K. Giovanetti, M. P. Green, V. E. Guiseppe, K. Gusey, A. L. Hallin, R. Hazama, R. Henning, A. Hime, E. W. Hoppe, M. Horton, S. Howard, M. A. Howe, R. A. Johnson, K. J. Keeter, C. Keller, M. F. Kidd, A. Knecht, O. Kochetov, S. I. Konovalov, R. T. Kouzes, B. LaFerriere, B. H. LaRoque, J. Leon, L. E. Leviner, J. C. Loach, S. MacMullin, M. G. Marino, R. D. Martin, D. -M. Mei, J. Merriman, M. L. Miller, L. Mizouni, M. Nomachi, J. L. Orrell, N. R. Overman, A. W. P. Poon, G. Perumpilly, G. Prior, D. C. Radford, K. Rielage, R. G. H. Robertson, M. C. Ronquest, A. G. Schubert, T. Shima, M. Shirchenko, K. J. Snavely, D. Steele, J. Strain, K. Thomas, V. Timkin, W. Tornow, I. Vanyushin, R. L. Varner, K. Vetter, K. Vorren, J. F. Wilkerson, B. A. Wolfe, E. Yakushev, A. R. Young, C. -H. Yu, V. Yumatov, C. Zhang
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Presentation for the Rutherford Centennial Conference on Nuclear Physics
The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to determine whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak.
Addendum to: QRPA uncertainties and their correlations in the analysis of neutrinoless double beta decay
在以前的文章[Phys. Rev. D 79，053001（2009）]中，我们在准粒子无规相位近似（QRPA）中估计了与无中微子双β衰变（0 nu β β）的核矩阵元（NME）相关的不确定性。这种估计包括最近对NME的独立计算，因此仍然可以提供核模型不确定性的公平代表。在这种情况下，我们比较了Ge-76中0 nu β β衰变的声明与最近在Ge-136和其他核中的负结果，并推断了在90% C. L.时允许或排除的寿命范围。我们还强调了一些问题，应加以解决，以适当地比较和结合来自不同的0 nu β β衰变候选核的结果。
