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New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the European Spallation Source | | A. Addazi
; K. Anderson
; S. Ansell
; K. Babu
; J. Barrow
; D.V. Baxter
; P.M. Bentley
; Z. Berezhiani
; R. Bevilacqua
; C. Bohm
; G. Brooijmans
; J. Broussard
; R. Biondi
; B. Dev
; C. Crawford
; A. Dolgov
; K. Dunne
; P. Fierlinger
; M.R. Fitzsimmons
; A. Fomin
; M. Frost
; S. Gardner
; A. Galindo-Uribarri
; E. Golubeva
; S. Girmohanta
; G.L. Greene
; T. Greenshaw
; V. Gudkov
; R. Hall-Wilton
; L. Heilbronn
; J. Herrero-Garcia
; G. Ichikawa T.M. Ito
; E. Iverson
; T. Johansson
; L. Joensson
; Y-J. Jwa
; Y. Kamyshkov
; K. Kanaki
; E. Kearns
; M. Kitaguchi
; T. Kittelmann
; E. Klinkby
; L.W. Koerner
; B. Kopeliovich
; A. Kozela
; V. Kudryatsev
; A. Kupsc
; Y. Lee
; M. Lindroos
; J. Makkinje
; J.I. Marquez
; R. Mohapatra
; B. Meirose
; T.M. Miller
; D. Milstead
; T. Morishima
; G. Muhrer
; H.P. Mumm
; K. Nagamoto
; V.V. Nesvizhevsky
; T. Nilsson
; A. Oskarsson
; E. Paryev
; R.W. Pattie Jr
; S. Penttil
; Y. N. Pokotilovski
; I. Potashnikova
; C. Redding
; J-M Richard
; D. Ries
; E. Rinaldi
; A. Ruggles
; B. Rybolt
; V. Santoro
; U. Sarkar
; A. Saunders
; G. Senjanovic
; A.P. Serebrov
; H.M. Shimizu
; R. Shrock
; S. Silverstein
; D. Silvermyr
; W.M. Snow
; A. Takibayev
; L. Townsend
; I. Tkachev
; L. Varriano
; A. Vainshtein
; J. de VRies
; R. Woracek
; Y. Yamagata
; A.R. Young
; L. Zanini
; Z. Zhang
; O. Zimmer
; | | Date: |
8 Jun 2020 | | Abstract: | The violation of Baryon Number, $mathcal{B}$, 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 %experiment program is a proposed
two-stage experiment at the European Spallation Source (ESS) 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 ($n
ightarrow ar{n}$) via mixing,
neutron-antineutron oscillation via regeneration from a sterile neutron state
($n
ightarrow [n’,ar{n}’]
ightarrow ar{n}$), and neutron disappearance
($n
ightarrow n’$); the effective $Delta mathcal{B}=0$ process of neutron
regeneration ($n
ightarrow [n’,ar{n}’]
ightarrow n$) is also possible. The
program can be used to discover and characterise mixing in the neutron,
antineutron, and sterile neutron sectors. The experiment addresses topical open
questions such as the origins of baryogenesis, 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 extit{three orders
of magnitude} compared with previous searches. The opportunity to make such a
leap in sensitivity tests should not be squandered. %represents a set of
cross-disciplinary experiments with clear %particle %fundamental physics goals,
%seems redundant to me 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. | | Source: | arXiv, 2006.4907 | | Services: | Forum | Review | PDF | Favorites | |
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