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Search for Pauli exclusion principle violating atomic transitions and electron decay with a p-type point contact germanium detector

  • Author(s): Abgrall, N
  • Arnquist, IJ
  • Avignone, FT
  • Barabash, AS
  • Bertrand, FE
  • Bradley, AW
  • Brudanin, V
  • Busch, M
  • Buuck, M
  • Caldwell, AS
  • Chan, YD
  • Christofferson, CD
  • Chu, PH
  • Cuesta, C
  • Detwiler, JA
  • Dunagan, C
  • Efremenko, Y
  • Ejiri, H
  • Elliott, SR
  • Finnerty, PS
  • Galindo-Uribarri, A
  • Gilliss, T
  • Giovanetti, GK
  • Goett, J
  • Green, MP
  • Gruszko, J
  • Guinn, IS
  • Guiseppe, VE
  • Henning, R
  • Hoppe, EW
  • Howard, S
  • Howe, MA
  • Jasinski, BR
  • Keeter, KJ
  • Kidd, MF
  • Konovalov, SI
  • Kouzes, RT
  • LaFerriere, BD
  • Leon, J
  • MacMullin, J
  • Martin, RD
  • Massarczyk, R
  • Meijer, SJ
  • Mertens, S
  • Orrell, JL
  • O’Shaughnessy, C
  • Poon, AWP
  • Radford, DC
  • Rager, J
  • Rielage, K
  • Robertson, RGH
  • Romero-Romero, E
  • Shanks, B
  • Shirchenko, M
  • Suriano, AM
  • Tedeschi, D
  • Trimble, JE
  • Varner, RL
  • Vasilyev, S
  • Vetter, K
  • Vorren, K
  • White, BR
  • Wilkerson, JF
  • Wiseman, C
  • Xu, W
  • Yakushev, E
  • Yu, CH
  • Yumatov, V
  • Zhitnikov, I
  • et al.
Abstract

© 2016, The Author(s). A search for Pauli-exclusion-principle-violating Kα electron transitions was performed using 89.5 kg-d of data collected with a p-type point contact high-purity germanium detector operated at the Kimballton Underground Research Facility. A lower limit on the transition lifetime of 5.8 × 10 30 s at 90% C.L. was set by looking for a peak at 10.6 keV resulting from the X-ray and Auger electrons present following the transition. A similar analysis was done to look for the decay of atomic K-shell electrons into neutrinos, resulting in a lower limit of 6.8 × 10 30 s at 90% C.L. It is estimated that the Majorana Demonstrator, a 44 kg array of p-type point contact detectors that will search for the neutrinoless double-beta decay of 76Ge, could improve upon these exclusion limits by an order of magnitude after three years of operation.

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