Cosmic ray spectrum, composition and arrival direction distribution & PeV γ rays at the South Pole Paolo Desiati WIPAC & Department of Astronomy University of Wisconsin - Madison <[email protected]> Towards a Large Field-of-View TeV Experiment in the South Università di Roma Tor Vergata - January 14-15, 2016 1 IceCube Observatory the instrumentation Digital Optical Module (DOM) with 10” PMT & local DAQ electronics 2 IceCube Observatory the instrumentation two tanks of one IceTop station 3 IceCube Observatory km3 the instrumentation observatory two tanks of one IceTop station 3 IceCube Observatory main physics goals ‣ astrophysical neutrinos from the sources of cosmic rays supernova gamma ray active galactic remnants bursts nuclei ‣ atmospheric neutrinos: charm production, oscillations energy hadronic neutrino spectrum models oscillations ‣ cosmic rays: spectrum, composition & anisotropy spectrum composition anisotropy ‣ beyond standard model & dark matter solar WIMPS sterile halo WIMPS spin dependent neutrinos ‣ PeV γ-rays, neutron point sources & Earth sciences stratospheric PeV neutron temperature gamma rays point sources seasonal variations 4 IceCube Observatory main physics goals ‣ astrophysical neutrinos from the sources of cosmic rays supernova gamma ray active galactic remnants bursts nuclei ‣ atmospheric neutrinos: charm production, oscillations energy hadronic neutrino spectrum models oscillations ‣ cosmic rays: spectrum, composition & anisotropy spectrum composition anisotropy ‣ beyond standard model & dark matter solar WIMPS sterile halo WIMPS spin dependent neutrinos ‣ PeV γ-rays, neutron point sources & Earth sciences stratospheric PeV neutron temperature gamma rays point sources seasonal variations 4 neutrino identification 4 years of HE starting events E > 60 TeV astrophysical neutrinos ν ICRC 2015 • 53(+1) events found • estimated background 9.0+8.0 atm. neutrinos -2.2 12.6±5.1 atm. muons 1 atm. muon passing veto coincident CR showers 6.5 σ significance Aartsen et al. PRD 88 (2013) 112008 Aartsen et al. Science 342 (2013) 1242856 5 Aartsen et al. PRL 113 (2014) 101101 neutrino identification 4 years of HE starting events E > 60 TeV astrophysical neutrinos ν ICRC 2015 • 53(+1) events found • estimated background 9.0+8.0 atm. neutrinos -2.2 12.6±5.1 atm. muons 1 atm. muon passing veto coincident CR showers 6.5 σ significance Aartsen et al. PRD 88 (2013) 112008 Aartsen et al. Science 342 (2013) 1242856 6 Aartsen et al. PRL 113 (2014) 101101 full sky observations multi-experiment approach cosmic rays starting neutrinos and gamma rays North neutrinos neutrinos IceCube cosmic rays starting neutrinos 7 and PeV gamma rays cosmic rays starting neutrinos full sky observations φ and gamma rays - azi θ - ze m nith u t multi-experiment approach n h o ti a n cli e d - δ neutrinos α - rig h t a s c e n sio n neutrinos α - right ascension m u t h @ Northern Hemisphere φ - a zi n o θ ati • complementary and overlapping regions of the sky - n z cli e e ni d t h - cosmic rays δ • IceCube/Antares (arXiv:1511.02149) starting neutrinos and PeV gamma rays • Auger/TA (arXiv:1409.3128) 8 @ South Pole