Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Photograph: Forest Banks Gary C. Hill University of Wisconsin, Madison for the IceCube collaboration

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 It’s a mysterious universe!

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Neutrino and gamma production in cosmic ray accelerators? Hadronic accelerator? – cosmic ray origin? The TeV gammas? Let’s look for these neutrinos! -rays from fromsynchrotron

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Cosmic ray induced “guaranteed sources” Cosmic rays on Cosmic Microwave Background: GZK neutrinos GZK neutrinos EHE: GeV EHE: GeV Cosmic rays on the earth’s atmosphere: Atmospheric neutrinos Cosmic rays on galactic plane: galactic plane neutrinos

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 The high-energy neutrino sky

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Atmospheric Neutrinos Cosmic Ray ≈15 Km π+π+  + e+e+ e  

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009

backgroundatmosphericmuon Direction: Reconstruction of Cerenkov cone Energy: Counting of modules that see photons

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009

Event Signatures in IceCube  signature  signature eV (10 TeV) ~90 hits 6x10 15 eV (6 PeV) ~1000 hits Multi-PeV   +N  +...  ± (300 m!)   +hadrons AMANDA Expect about 100,000 events/yr

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Where are we pointing?

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Moon declination during first 15 years

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 RA distribution relative to moon

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Li and Ma significance distribution

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Point source searches

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 IC40 6 month all-sky point source search

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 pre-trial significance expected in 61% of random skies IC40 6 month all-sky point source search

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Search for a diffuse  signal with IC40 Diffuse models all harder (~E -2 ) than atmospheric (~E -3.7 ): energy separation Nch variable Range of spectral slopes: start with E -2

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Blind region Energy separation: Nch variable Blind analysis: Best limit setting power (model rejection potential) Nch>100 E -2 test flux Atmospheric neutrinos

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Sensitivity: for bg=6.1 events median event limit 5.84 Flux limit : 5.84/66.7x10 -6 = 8.8 x = 8.8 x 10 -8

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Unblind the data: 6 events observed event limit 5.84 Flux limit : 5.84/66.1x10 -6 = 8.8 x = 8.8 x 10 -8

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Reconstructing The Muon energy loss Reconstructing The Muon energy loss Approximate as: dusty clean deep shallow Incorporate Ice Properties: Formulate LLH: e+e-e+e-    pair-creation bremsstrahlung photo-nuclear

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Energy estimator comparison Reconstructed dE/dX Number of Channels

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Atmospheric neutrinos E -2 test flux

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Likelihood shape analysis - probability of observable shape distribution {n i } given theory {μ i } ? Product of Poisson probabilities over bins: m parameters of interest; k-m nuisance parameters

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Atmospheric neutrinos only

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Allowed E -2 and prompt contributions Number of E -2 Number of prompt

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Atmospheric and E -2 neutrinos

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Allowed E -2 and prompt contributions Number of E -2 Number of prompt

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Atmospheric, E -2 and prompt neutrinos

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 Allowed E -2 and prompt contributions Number of E -2 Number of prompt

Gary C. Hill, CCAPP Symposium 2009, Ohio State University, October 12th, 2009 IC40 diffuse sensitivity