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Observing Supernova Neutrinos to Late Times
Shirley Li The Ohio State University Collaborators: Luke Roberts, John Beacom TeVPA, August 2017
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? Timescale of a SN Detectable! 2/11 Shirley Li (OSU)
Figure credit: R.J. Hall 2/11
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First input -- simulation
Luke Roberts Blondin et al., 2003 Shirley Li (OSU) 3/11
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4/11
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Late-time neutrinos are interesting!
Neutrino luminosity NS! 1/t behavior Transparency time Connects SN and NS Preliminary Late-time neutrinos are interesting! Shirley Li (OSU) 5/11
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Late-time neutrinos are robust!
Neutrino energy Moderate mixing effect Preliminary Late-time neutrinos are robust! Shirley Li (OSU) 6/11
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π π signal rate in Super-K
π π +πβ π + +π Inputs: 10 kpc SN 22.5 kton 3.5 MeV threshold Preliminary Plenty of events in Super-K! Shirley Li (OSU) 7/11
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Other flavors Shirley Li (OSU) 8/11
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Alternative outcome -- BH
Different mechanisms for BH formation Preliminary BH may form at late times Shirley Li (OSU) 9/11
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Detecting BH formation
Detection significance of BH formation Preliminary We can detect BH formation at late times Shirley Li (OSU) 10/11
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Conclusions Shirley Li (OSU) 11/11
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Thank you!
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Back up
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Easily reconstruct neutrino spectrum
π π energy spectrum π π +πβ π + +π πΈ π + = πΈ π π β 1.3 MeV --- known detection threshold Preliminary Easily reconstruct neutrino spectrum Shirley Li (OSU)
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Plenty of events to late time in DUNE!
π π signal rate in DUNE π π +40Arβ π β +40 K β Inputs: 10 kpc SN 40 kton 5 MeV threshold Preliminary Plenty of events to late time in DUNE! Shirley Li (OSU)
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Detection threshold needs to reach ~ 5 MeV
π π energy spectrum π π +40Arβ π β +40 K β πΈ π = πΈ π π β 5.8 MeV --- unknown detection threshold Preliminary Detection threshold needs to reach ~ 5 MeV Shirley Li (OSU)
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Non-negligible events at late time
π π₯ signal rate π π₯ +πβ π π₯ +π Inputs: 10 kpc SN 22.5 kton 0.1, 0.2 MeV threshold Preliminary Non-negligible events at late time Shirley Li (OSU)
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Detection threshold is crucial
π π₯ energy spectrum π π₯ +πβ π π₯ +π πΈ det βͺ πΈ π π₯ --- unknown detection threshold Preliminary Detection threshold is crucial Shirley Li (OSU)
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