New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source
Journal article, 2021
The violation of baryon number, 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 via mixing, neutron-antineutron oscillation via regeneration from a sterile neutron state , and neutron disappearance (n → n′); the effective process of neutron regeneration 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.
Author
A. Addazi
Sichuan University
K. Anderson
Oak Ridge National Laboratory
Stuart Ansell
MAX IV Laboratory
K.S. Babu
Oklahoma State University
J.L. Barrow
University of Tennessee
D.V. Baxter
Indiana University
P.M. Bentley
European Spallation Source (ESS)
Z. Berezhiani
Laboratori Nazionali del Gran Sasso
R. Bevilacqua
European Spallation Source (ESS)
R. Biondi
Laboratori Nazionali del Gran Sasso
C. Bohm
Stockholm University
G. Brooijmans
Stockholm University
L.J. Broussard
Oak Ridge National Laboratory
J. Cederc ll
Lund University
C. Crawford
University of Kentucky
P.S.B. Dev
Washington University in St. Louis
D.D. DiJulio
European Spallation Source (ESS)
A.D. Dolgov
Alikhanov Institute for Theoretical and Experimental Physics
K. Dunne
Stockholm University
P. Fierlinger
Technical University of Munich
M.R. Fitzsimmons
University of Tennessee
A. Fomin
Petersburg Nuclear Physics Institute (PNPI)
M.J. Frost
Oak Ridge National Laboratory
S. Gardiner
Oak Ridge National Laboratory
S. Gardner
University of Kentucky
A. Galindo-Uribarri
Oak Ridge National Laboratory
P. Geltenbort
Institut Laue-Langevin
S. Girmohanta
Stony Brook University
P.I. Golubev
Lund University
E. Golubeva
Russian Academy of Sciences
G.L. Greene
University of Tennessee
T. Greenshaw
University of Liverpool
V. Gudkov
University of South Carolina
R. Hall-Wilton
European Spallation Source (ESS)
Lawrence Heilbronn
University of Tennessee
J. Herrero-Garcia
Scuola Internazionale Superiore di Studi Avanzati
A. Holley
Tennessee Tech University
G. Ichikawa
High Energy Accelerator Research Organization
T.M. Ito
Los Alamos National Laboratory
E. Iverson
Oak Ridge National Laboratory
T. Johansson
Uppsala University
L. Jönsson
Uppsala University
Y.-J. Jwa
Stockholm University
Y. Kamyshkov
University of Tennessee
K. Kanaki
European Spallation Source (ESS)
E. Kearns
Boston University
Z. Kokai
European Spallation Source (ESS)
B. Kerbikov
Alikhanov Institute for Theoretical and Experimental Physics
M. Kitaguchi
Nagoya University
T. Kittelmann
European Spallation Source (ESS)
E. Klinkby
Technical University of Denmark (DTU)
A. Kobakhidze
The University of Sydney
L.W. Koerner
University of Houston
B. Kopeliovich
Universidad Técnica Federico Santa María
A. Kozela
Polish Academy of Sciences
V. Kudryavtsev
University of Sheffield
A. Kupsc
Los Alamos National Laboratory
Y.T. Lee
European Spallation Source (ESS)
Mats Lindroos
European Spallation Source (ESS)
J. Makkinje
Columbia University
J.I. Marquez
European Spallation Source (ESS)
B. Meirose
Stockholm University
T.M. Miller
European Spallation Source (ESS)
D. Milstead
Stockholm University
R.N. Mohapatra
University of Maryland
T. Morishima
Moscow Institute of Physics and Technology
G. Muhrer
European Spallation Source (ESS)
H.P. Mumm
National Institute of Standards and Technology (NIST)
K. Nagamoto
Moscow Institute of Physics and Technology
A. Nepomuceno
Fluminense Federal University
F. Nesti
University of L'Aquila
V.V. Nesvizhevsky
Institut Laue-Langevin
Thomas Nilsson
Chalmers, Physics
A. Oskarsson
Lund University
E. Paryev
Russian Academy of Sciences
R.W. Pattie
East Tennessee State University
S. Penttil
Oak Ridge National Laboratory
H. Perrey
Lund University
Y.N. Pokotilovski
Lund University
I. Potashnikovav
University of Houston
K. Ramic
European Spallation Source (ESS)
C. Redding
University of Tennessee
J.-M. Richard
Université de Lyon
D. Ries
Johannes Gutenberg University Mainz
E. Rinaldi
RIKEN
N. Rizzi
Nagoya University
N. Rossi
Laboratori Nazionali del Gran Sasso
A. Ruggles
University of Tennessee
B. Rybolt
Kennesaw State University
V. Santoro
European Spallation Source (ESS)
U. Sarkar
Indian Institute of Technology
A. Saunders
European Spallation Source (ESS)
G. Senjanovic
Abdus Salam International Centre for Theoretical Physics
A.P. Serebrov
Petersburg Nuclear Physics Institute (PNPI)
H.M. Shimizu
Moscow Institute of Physics and Technology
R. Shrock
Stony Brook University
S. Silverstein
Stockholm University
D. Silvermyr
Lund University
William Snow
Indiana University
A. Takibayev
European Spallation Source (ESS)
I. Tkachev
Russian Academy of Sciences
L. Townsend
Joint Institute for Nuclear Research (JINR)
A. Tureanu
University of Helsinki
L. Varriano
University of Chicago
A. Vainshtein
University of Minnesota
J. De Vries
University of Massachusetts
R. Wagner
Institut Laue-Langevin
R. Woracek
European Spallation Source (ESS)
Y. Yamagata
RIKEN
S. Yiu
Stockholm University
A.R. Young
North Carolina State University
L. Zanini
European Spallation Source (ESS)
Z. Zhang
California Institute of Technology (Caltech)
O. Zimmer
Institut Laue-Langevin
Journal of Physics G: Nuclear and Particle Physics
0954-3899 (ISSN) 13616471 (eISSN)
Vol. 48 7 070501HIBEAM at the ESS
Swedish Research Council (VR) (2021-06231_4), 2021-12-01 -- 2023-12-31.
Subject Categories
Accelerator Physics and Instrumentation
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1088/1361-6471/abf429