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Muon-induced spallation backgrounds in DUNE Guanying Zhu - PowerPoint PPT Presentation

Oct 25, 2023 •19 likes •139 views

Muon-induced spallation backgrounds in DUNE Guanying Zhu Collaborators: Shirley Li and John Beacom (Ph.D. advisor) The Ohio State University 1 Deep Underground Neutrino Experiment Far detector at Sanford - LArTPC GeV neutrino beam from

  1. Muon-induced spallation backgrounds in DUNE Guanying Zhu Collaborators: Shirley Li and John Beacom (Ph.D. advisor) The Ohio State University 1

  2. Deep Underground Neutrino Experiment Far detector at Sanford - LArTPC GeV neutrino beam from FermiLab 4 * 10 kton liquid argon Long baseline: study CP violation and mass hierarchy ~1.5 km underground Will be the largest particle experiment in the US Partially funded right now 2 Guanying Zhu, The Ohio State University TeVPA, 2017

  3. Supernova neutrino detection @ DUNE ? 3 Guanying Zhu, The Ohio State University TeVPA, 2017

  4. Advantages of DUNE for SNB detection SNB @ SuperK SNB @ DUNE ~ 10^3 events ~ 10^4 events Mostly Favors 4 Guanying Zhu, The Ohio State University TeVPA, 2017

  5. Spallation backgrounds @ DUNE ? A few work has been done Large variations exist What are the production processes? What are the background isotopes? Thorough work is highly needed! 5 Guanying Zhu, The Ohio State University TeVPA, 2017

  6. Spallation mechanism CR muon Signal: Ar, O, etc. isotope Bkg: e 6 Guanying Zhu, The Ohio State University TeVPA, 2017

  7. Spallation — Muons produce showers Li & Beacom 2014, 2015, 2015 7 Guanying Zhu, The Ohio State University TeVPA, 2017

  8. Spallation — Showers produce isotopes Li & Beacom 2014, 2015, 2015 8 Guanying Zhu, The Ohio State University TeVPA, 2017

  9. Spallation backgrounds @ DUNE Detection threshold ~ 5 MeV Argon-nearby (Ar, Cl, S, P, etc) High yields Do not matter much Oxygen-nearby (Li, B, N, etc) Low yields Important 9 Guanying Zhu, The Ohio State University TeVPA, 2017

  10. Spallation backgrounds @ DUNE Detection threshold ~ 5 MeV Argon-nearby (Ar, Cl, S, P, etc) High yields, Long lifetimes Do not matter much Oxygen-nearby (Li, B, N, etc) Low yields, Short lifetimes Important 10 Guanying Zhu, The Ohio State University TeVPA, 2017

  11. Conclusion DUNE is capable to see next galactic supernova burst! Detection of supernova neutrinos can reveal important physics. Surprisingly, abundantly produced argon-nearby isotopes do not matter much at DUNE. Oxygen-nearby isotopes, with low yields, contribute most to the spallation backgrounds. The spallation background rate is way lower than the SNB rates at DUNE. 11 11 Guanying Zhu, The Ohio State University TeVPA, 2017

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