Status of the Design of an Annihilation Detector to Observe Neutron-Antineutron Conversions at the European Spallation Source

Sze Chun Yiu, Bernhard Meirose, Joshua Barrow, Christian Bohm, Gustaaf Brooijmans, Katherine Dunne, Elena S. Golubeva, David Milstead, André Nepomuceno, Anders Oskarsson, Valentina Santoro, Samuel Silverstein

Research output: Contribution to journalArticlepeer-review

Abstract

The goal of the HIBEAM/NNBAR program is to search for baryon number violation via the conversion or oscillation of neutrons into sterile neutrons and/or antineutrons at the European Spallation Source. A key experimental component of the program is the construction of an annihilation detector to directly observe the production of an antineutron following the oscillation. Design studies for the annihilation detector are presented. The predicted response of the detector models are studied using GEANT4 simulations made with Monte Carlo simulations of the annihilation signal topology and cosmic ray backgrounds. Particle identification and sensitive discriminating observables, such as invariant mass and sphericity, are shown.

Original languageEnglish
Article number76
JournalSymmetry
Volume14
Issue number1
DOIs
Publication statusPublished - 2022

Subject classification (UKÄ)

  • Subatomic Physics
  • Accelerator Physics and Instrumentation

Free keywords

  • Baryon number violation
  • Detector simulation
  • Neutron-antineutron oscillations
  • Particle detectors
  • Sterile neutrons

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