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Neutrino (The IceCube Neutrino Observatory and the begining of Neutrino…

- - - - p been acce should slao be interact with enviroment
        if with gamma, get p and pi or n and pi+......=>cosmic rays
        other ways get gammas like inverse Compton
        so gamma fit ioto cosmic ray acce
        if get cgarged pi =>get neutrino
        or if pp can get pi
        connect toghther
        so we can look for neutrino
        
        if look at flux do cal from this kind of sources
        need km cubic detector see 10 v above atm v background per year
        =>high E to get away from background
  - - - highest energy in light
    - - charged pariticles bend by B field
        challenge to back to sources
        valuavle on what's going on the astrophycal object
    - - Neutral
        hard to detect
        from deep inside,which might be otherwise opaque
  - - - three flavors
      - lightest particles
      - oscillation
        flavor eigenstate not the same as mass eigenstate
    - - not yet detect
        cosmological：high flux low energy
        background from old supernavae：super K going after
        cosmogenic：many ex try to find based in the radio
      - cosmological：big bang=neutrino CMB
        cosmogenic：cosmic ray interact with CMB
        atmospheric：cosmic rays interact with atmosphere
        from AGN=from cosmic ray accelerators
- - - - discontinuity od beta
        
        two body decay
      - energy conservation
      - Pauli postulated
      - Fermi propose beta decay
      - 王淦昌 K-electron capture
      - Reines detected
        
        Nobel prize
  - - - Boson
        
        description of force
        
        Higgs
      - Fermion
  - - - Davis
        
        sun neutrino spectrum
        
        neutrino problem
        
        25-year experiment
      - 小柴昌俊
        
        Cherenkov radiation
        
        SN1987A
    - - 梶田隆章
        
        超級神岡
        
        1998 atmosphere neutrino oscillation
      - McDonald
        
        SNO
        
        2001 sun neutrino ocillation
    - - neutrino oscillation
    - - new mode of neutrino oscillation
      - 2012 Sicience brealthrough of year
    - - mass
      - flavors
    - - Daya Bay
      - DUNE
      - IceCube
        
        IceCube Gen2
      - muti-messenger astronomy
  - - - not scattering
      - not bend by B field
      - penatrate high dense medium
        
        graph of blazar
      - not absorbed
        
        sun image