A model of antineutron annihilation in experimental searches for neutron-antineutron transformations

Abstract

Searches for baryon number violation, including searches for proton decay and neutron-antineutron transformation, are expected to play an important role in the evolution of our understanding of beyond Standard Model physics. The neutron-antineutron transformation is a key prediction of certain popular theories of baryogenesis, and the experiments such as the Deep Underground Neutrino Experiment and the European Spallation Source plan to search for this process with bound- and free-neutron systems. Accurate simulation of this process in Monte Carlo will be important for the proper reconstruction and separation of these rare events from background. This article presents developments towards accurate simulation of the annihilation process for use in a cold, free neutron beam for neutron-antineutron searches from antineutron-carbon annihilation, as carbon-12 is the target of choice for the European Spallation Source's NNBar Collaboration. Initial efforts are also made in this paper to perform analogous studies for intra-nuclear transformation searches in argon-40 nuclei, although this latter work will be properly addressed in our next publication.

arXiv comment24 pages, 13 figures, 5 tables, 54 references, European Spallation Source NNbar Collaboration signal simulation article

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Cited by in corpus (13)

• Prospects for Beyond the Standard Model Physics Searches at the Deep Underground Neutrino Experiment
• New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the European Spallation Source
• Particle Physics at the European Spallation Source
• Progress and Simulations for Intranuclear Neutron--Antineutron Transformations in ${}_{18}^{40}Ar$
• A new operating mode in experiments searching for free neutron-antineutron oscillations based on coherent neutron and antineutron mirror reflections
• The Development of the NNBAR Experiment
• The effect of collisions with the wall on neutron-antineutron transitions
• A new approach to search for free neutron-antineutron oscillations using coherent neutron propagation in gas
• The HIBEAM Instrument at the European Spallation Source
• A New Model of Intranuclear Neutron-Antineutron Transformations in ${}_8^{16}$O
• Pocket resonances in low-energy antineutrons reactions with nuclei
• Effects of Neutron-Antineutron Transitions in Neutron Stars
• A Computing and Detector Simulation Framework for the HIBEAM/NNBAR Experimental Program at the ESS