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Muon-induced spallation backgrounds in DUNEGuanying ZhuCollaborators: Shirley Li and John Beacom (Ph.D. advisor)The Ohio State University1
Deep Underground Neutrino ExperimentGeV neutrino beam from FermiLabFar detector at Sanford - LArTPCLong baseline: study CP violation and mass hierarchy4 * 10 kton liquid argonWill be the largest particle experiment in the US 1.5 km undergroundPartially funded right nowGuanying Zhu, The Ohio State UniversityTeVPA, 20172
Supernova neutrino detection@ DUNE ?Guanying Zhu, The Ohio State UniversityTeVPA, 20173
Advantages of DUNE for SNB detectionSNB @ SuperKSNB @ DUNE 10 4 events 10 3 eventsMostlyFavorsGuanying Zhu, The Ohio State UniversityTeVPA, 20174
Spallation backgrounds @ DUNE ?A few work has been doneLarge variations existWhat are the production processes?What are the background isotopes?Thorough work is highly needed!Guanying Zhu, The Ohio State UniversityTeVPA, 20175
Spallation mechanismSignal:CR muonAr, O, etc.isotopeBkg:Guanying Zhu, The Ohio State UniversityeTeVPA, 20176
Spallation — Muons produce showersLi & Beacom 2014, 2015, 2015Guanying Zhu, The Ohio State UniversityTeVPA, 20177
Spallation — Showers produce isotopesLi & Beacom 2014, 2015, 2015Guanying Zhu, The Ohio State UniversityTeVPA, 20178
Spallation backgrounds @ DUNEDetection threshold 5 MeVArgon-nearby (Ar, Cl, S, P, etc)High yieldsDo not matter muchOxygen-nearby (Li, B, N, etc)Low yieldsImportantGuanying Zhu, The Ohio State UniversityTeVPA, 20179
Spallation backgrounds @ DUNEDetection threshold 5 MeVArgon-nearby (Ar, Cl, S, P, etc)High yields, Long lifetimesDo not matter muchOxygen-nearby (Li, B, N, etc)Low yields, Short lifetimesImportantGuanying Zhu, The Ohio State UniversityTeVPA, 201710
ConclusionDUNE is capable to see next galactic supernova burst!Detection of supernova neutrinos can reveal important physics.Surprisingly, abundantly produced argon-nearby isotopes donot matter much at DUNE. Oxygen-nearby isotopes, with lowyields, contribute most to the spallation backgrounds.The spallation background rate is way lower than the SNBrates at DUNE.Guanying Zhu, The Ohio State UniversityTeVPA, 201711
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
