Work by Jeremy Hewes Georgia Karagiorgi and Joshua

Work by Jeremy Hewes, Georgia Karagiorgi and Joshua Barrow Presented by Joshua Barrow jbarrow 3@vols. utk. edu

• ESS, 3 yr, ~500 X ILL DUNE (0 Bkgd) ESS (0 Bkgd) • Red line shows horizontal beamline oscillation time Babu, Dev, Fortes, and Mohapatra-DOI: 10. 1103/Phys. Rev. D. 87. 115019 DUNE (SK Bkgd) • A probability distribution from PSB can be seen as a function of predicted free oscillation time 12/4/2020 • 10 years, ~13, 500 X ILL • Assumes 100% efficiency! • Assumes no background! • Blue shows DUNE Super-Kamiokande ESS Neutron-Antineutron Transformation Workshop 2

- Antineutron - Neutron - Proton - Pion 12/4/2020 ESS Neutron-Antineutron Transformation Workshop 3

• 12/4/2020 ESS Neutron-Antineutron Transformation Workshop 4

• 12/4/2020 ESS Neutron-Antineutron Transformation Workshop 5

Excellence of LAr. TPCs—See Micro. Boo. NE • 12/4/2020 ESS Neutron-Antineutron Transformation Workshop Proton reconstruction is an important step for DUNE in nucleon decay searches; SK will soon add gadolinium to their WCD to track neutrons! 6

LAr. TPC and WC Comparisons Water Cherenkov Detectors Liquid Argon Time Projection Chambers • • 12/4/2020 December 7 th, 2017 ESS Neutron-Antineutron Transformation PHD COMPREHENSIVE EXAMINATION PRESENTATION Workshop 7 7

Adapted from Y. Kamyshkov • Free neutron beam search goal at European Spallation Source Barrow Hewes & Karageorgi 12/4/2020 December 7 th, 2017 ESS Neutron-Antineutron Transformation PHD COMPREHENSIVE EXAMINATION PRESENTATION Workshop 8 8

• Interior Nucleon Momentum (Ge. V/c) 12/4/2020 ESS Neutron-Antineutron Transformation Workshop 9

• 12/4/2020 ESS Neutron-Antineutron Transformation Workshop 10