New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source

Addazi, A.; Anderson, K.; Ansell, S.; Babu, K. S.; Barrow, J. L.; Baxter, D. V.; Bentley, P. M.; Berezhiani, Z.; Bevilacqua, R.; Biondi, R.; Bohm, C.; Brooijmans, G.; Broussard, L. J.; Cedercäll, J.; Crawford, C.; Dev, P. S. B.; DiJulio, D. D.; Dolgov, A. D.; Dunne, K.; Fierlinger, P.; Fitzsimmons, M. R.; Fomin, A.; Frost, M. J.; Gardiner, S.; Gardner, S.; Galindo-Uribarri, A.; Geltenbort, P.; Girmohanta, S.; Golubev, P.; Golubeva, E.; Greene, G. L.; Greenshaw, T.; Gudkov, V.; Hall-Wilton, R.; Heilbronn, L.; Herrero-Garcia, J.; Holley, A.; Ichikawa, G.; Ito, T. M.; Iverson, E.; Johansson, T.; Jönsson, L.; Jwa, Y.-J.; Kamyshkov, Y.; Kanaki, K.; Kearns, E.; Kokai, Z.; Kerbikov, B.; Kitaguchi, M.; Kittelmann, T.; Klinkby, E.; Kobakhidze, A.; Koerner, L. W.; Kopeliovich, B.; Kozela, A.; Kudryavtsev, V.; Kupsc, A.; Lee, Y. T.; Lindroos, M.; Makkinje, J.; Marquez, J. I.; Meirose, B.; Miller, T. M.; Milstead, D.; Mohapatra, R. N.; Morishima, T.; Muhrer, G.; Mumm, H. P.; Nagamoto, K.; Nepomuceno, A.; Nesti, F.; Nesvizhevsky, V. V.; Nilsson, T.; Oskarsson, A.; Paryev, E.; Pattie, R. W.; Penttil, S.; Perrey, H.; Pokotilovski, Y. N.; Potashnikovav, I.; Ramic, K.; Redding, C.; Richard, J.-M.; Ries, D.; Rinaldi, E.; Rizzi, N.; Rossi, N.; Ruggles, A.; Rybolt, B.; Santoro, V.; Sarkar, U.; Saunders, A.; Senjanovic, G.; Serebrov, A. P.; Shimizu, H. M.; Shrock, R.; Silverstein, S.; Silvermyr, D.; Snow, W. M.; Takibayev, A.; Tkachev, I.; Townsend, L.; Tureanu, A.; Varriano, L.; Vainshtein, A.; de Vries, J.; Wagner, R.; Woracek, R.; Yamagata, Y.; Yiu, S.; Young, A. R.; Zanini, L.; Zhang, Z.; Zimmer, O.

doi:10.1088/1361-6471/abf429

Published July 2021 | Version Submitted + Published

Journal Article Open

New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source

1. Sichuan University
2. INFN Sezione di Roma II
3. Oak Ridge National Laboratory
4. MAX IV Laboratory
5. Oklahoma State University
6. University of Tennessee at Knoxville
7. Indiana University Bloomington
8. European Spallation Source
9. Gran Sasso National Laboratory
10. University of L'Aquila
11. Stockholm University
12. Lund University
13. University of Kentucky
14. Washington University in St. Louis
15. Institute for Theoretical and Experimental Physics
16. Federico Santa María Technical University
17. Technical University of Munich
18. Institut Laue-Langevin
19. Stony Brook University
20. Institute for Nuclear Research
21. University of Liverpool
22. University of South Carolina
23. International School for Advanced Studies
24. Tennessee Technological University
25. High Energy Accelerator Research Organization
26. Los Alamos National Laboratory
27. Uppsala University
28. Boston University
29. P.N. Lebedev Physical Institute of the Russian Academy of Sciences
30. Moscow Institute of Physics and Technology
31. Nagoya University
32. Technical University of Denmark
33. University of Sydney
34. University of Houston
35. Institute of Nuclear Physics, Polish Academy of Sciences
36. University of Sheffield
37. Columbia University
38. University of Maryland, College Park
39. National Institute of Standards and Technology
40. Fluminense Federal University
41. Chalmers University of Technology
42. East Tennessee State University
43. Johannes Gutenberg University of Mainz
44. RIKEN
45. Arithmer (Japan)
46. Kennesaw State University
47. Indian Institute of Technology Kharagpur
48. International Centre for Theoretical Physics
49. Ludwig-Maximilians-Universität München
50. Joint Institute for Nuclear Research
51. University of Helsinki
52. University of Chicago
53. University of Minnesota
54. University of Massachusetts Amherst
55. RIKEN BNL Research Center
56. North Carolina State University
57. California Institute of Technology

The violation of baryon number, B, is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, such a process has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation. The program will include high-sensitivity searches for processes that violate baryon number by one or two units: free neutron–antineutron oscillation (n → n) via mixing, neutron–antineutron oscillation via regeneration from a sterile neutron state (n → [n',n'] → n), and neutron disappearance (n → n'); the effective ΔB = 0 process of neutron regeneration (n → [n',n'] → n) is also possible. The program can be used to discover and characterize mixing in the neutron, antineutron and sterile neutron sectors. The experiment addresses topical open questions such as the origins of baryogenesis and the nature of dark matter, and is sensitive to scales of new physics substantially in excess of those available at colliders. A goal of the program is to open a discovery window to neutron conversion probabilities (sensitivities) by up to three orders of magnitude compared with previous searches. The opportunity to make such a leap in sensitivity tests should not be squandered. The experiment pulls together a diverse international team of physicists from the particle (collider and low energy) and nuclear physics communities, while also including specialists in neutronics and magnetics.

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© 2021 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 10 February 2021; Accepted for publication 1 April 2021; Published 14 June 2021. D Milstead gratefully acknowledges support from the Swedish Research Council. The work of Z Berezhiani is supported in part by CETEMPs at the University di L'Aquila. The work of Y Kamyshkov was supported in part by US DOE Grant DE-SC0014558. The work of S Girmohanta and R Shrock is supported in part by US NSF Grant NSF-PHY-1915093. The work of L Varriano is supported by a US National Science Foundation (NSF) Graduate Research Fellowship under Grant No. DGE-1746045. B Kerbikov is supported by RSF Grant 16-12-10414. Rabrindra Mohapatra gratefully acknowledges support from the NSF via the Grant: PHY-1914631. B Kopeliovich and I Potashnikova acknowledge Grants ANID—Chile FONDECYT 1170319, and ANID PIA/APOYO AFB180002. A Young is supported by the NSF Grant PHY-1914133 and the DOE Grant DE-FG02-ER41042. W M Snow acknowledges support from US National Science Foundation Grant PHY-1914405 and the Indiana University Center for Spacetime Symmetries. J L Barrow's work was supported by the US Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program. The SCGSR program is administered by the Oak Ridge Institute for Science and Education for the DOE under Contract No. DESC0014664. J L Barrow was also partially supported in part by the Visiting Scholars Award Program of the Universities Research Association. The work of P S B Dev is supported in part by the US Department of Energy under Grant No. DE-SC0017987, by the Neutrino Theory Network Program Grant No. DE-AC02-07CHI11359, and by a Fermilab Intensity Frontier Fellowship. L J Broussard is supported by the US DOE under Contract DE-AC05-00OR2272. This work is also funded by the European Union Framework Program for Research and Innovation Horizon 2020 in the HighNESS project, under Grant Agreement 951782. Data availability statement: The data that support the findings of this study are available upon reasonable request from the authors.

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Alternative title: New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the European Spallation Source

Eprint ID: 109638
Resolver ID: CaltechAUTHORS:20210629-150653999

Describes: https://arxiv.org/abs/2006.04907 (URL)

Swedish Research Council
University di L'Aquila
Department of Energy (DOE)
DE-SC0014558
NSF
PHY-1915093
NSF Graduate Research Fellowship
DGE-1746045
Russian Science Foundation
16-12-10414
NSF
PHY-1914631
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
1170319
Agencia Nacional de Investigación y Desarrollo (ANID)
AFB180002
NSF
PHY-1914133
Department of Energy (DOE)
DE-FG02-ER41042
NSF
PHY-1914405
Indiana University
Department of Energy (DOE)
DE-SC0014664
Universities Research Association
Department of Energy (DOE)
DE-SC0017987
Department of Energy (DOE)
DE-AC02-07CHI11359
Fermilab
Department of Energy (DOE)
DE-AC05-00OR2272
European Research Council (ERC)
951782

Created: 2021-06-29

Created from EPrint's datestamp field
Updated: 2022-07-12

Created from EPrint's last_modified field

Caltech groups: Walter Burke Institute for Theoretical Physics

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New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source

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New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source

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