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Search for Spontaneous Radiation from Wave Function Collapse in the Majorana Demonstrator.
Arnquist, I J; Avignone, F T; Barabash, A S; Barton, C J; Bhimani, K H; Blalock, E; Bos, B; Busch, M; Buuck, M; Caldwell, T S; Chan, Y-D; Christofferson, C D; Chu, P-H; Clark, M L; Cuesta, C; Detwiler, J A; Efremenko, Yu; Ejiri, H; Elliott, S R; Giovanetti, G K; Green, M P; Gruszko, J; Guinn, I S; Guiseppe, V E; Haufe, C R; Henning, R; Hervas Aguilar, D; Hoppe, E W; Hostiuc, A; Kim, I; Kouzes, R T; Lannen V, T E; Li, A; Lopez, A M; López-Castaño, J M; Martin, E L; Martin, R D; Massarczyk, R; Meijer, S J; Oli, T K; Othman, G; Paudel, L S; Pettus, W; Poon, A W P; Radford, D C; Reine, A L; Rielage, K; Ruof, N W; Tedeschi, D; Varner, R L.
Afiliação
  • Arnquist IJ; Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
  • Avignone FT; Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
  • Barabash AS; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
  • Barton CJ; National Research Center "Kurchatov Institute" Institute for Theoretical and Experimental Physics, Moscow, 117218 Russia.
  • Bhimani KH; Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
  • Blalock E; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Bos B; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Busch M; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Buuck M; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Caldwell TS; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Chan YD; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Christofferson CD; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Chu PH; Department of Physics, Duke University, Durham, North Carolina 27708, USA.
  • Clark ML; Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.
  • Cuesta C; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Detwiler JA; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Efremenko Y; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Ejiri H; South Dakota Mines, Rapid City, South Dakota 57701, USA.
  • Elliott SR; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Giovanetti GK; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Green MP; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Gruszko J; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT 28040 Madrid, Spain.
  • Guinn IS; Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.
  • Guiseppe VE; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
  • Haufe CR; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, USA.
  • Henning R; Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Hervas Aguilar D; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Hoppe EW; Physics Department, Williams College, Williamstown, Massachusetts 01267, USA.
  • Hostiuc A; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
  • Kim I; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Kouzes RT; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Lannen V TE; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Li A; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Lopez AM; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • López-Castaño JM; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Martin EL; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
  • Martin RD; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Massarczyk R; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Meijer SJ; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Oli TK; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Othman G; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Paudel LS; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Pettus W; Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
  • Poon AWP; Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.
  • Radford DC; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Reine AL; Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
  • Rielage K; Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
  • Ruof NW; Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27514, USA.
  • Tedeschi D; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Varner RL; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, USA.
Phys Rev Lett ; 129(8): 080401, 2022 Aug 19.
Article em En | MEDLINE | ID: mdl-36053678
ABSTRACT
The Majorana Demonstrator neutrinoless double-beta decay experiment comprises a 44 kg (30 kg enriched in ^{76}Ge) array of p-type, point-contact germanium detectors. With its unprecedented energy resolution and ultralow backgrounds, Majorana also searches for rare event signatures from beyond standard model physics in the low energy region below 100 keV. In this Letter, we test the continuous spontaneous localization (CSL) model, one of the mathematically well-motivated wave function collapse models aimed at solving the long-standing unresolved quantum mechanical measurement problem. While the CSL predicts the existence of a detectable radiation signature in the x-ray domain, we find no evidence of such radiation in the 19-100 keV range in a 37.5 kg-y enriched germanium exposure collected between December 31, 2015, and November 27, 2019, with the Demonstrator. We explored both the non-mass-proportional (n-m-p) and the mass-proportional (m-p) versions of the CSL with two different assumptions that only the quasifree electrons can emit the x-ray radiation and that the nucleus can coherently emit an amplified radiation. In all cases, we set the most stringent upper limit to date for the white CSL model on the collapse rate, λ, providing a factor of 40-100 improvement in sensitivity over comparable searches. Our limit is the most stringent for large parts of the allowed parameter space. If the result is interpreted in terms of the Diòsi-Penrose gravitational wave function collapse model, the lower bound with a 95% confidence level is almost an order of magnitude improvement over the previous best limit.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article