Neutrinos

79ba9d4ea5663bf43883d317bf23a267?s=47 Daniel Scully
October 10, 2012

 Neutrinos

A talk all about the most mysterious, yet interesting particles in the whole of Physics. The history of neutrinos has been one of constantly upsetting the status quo, something they continue to do to this day. I talk about their history, what they've taught us so far, and what we hope to learn from them in the future.

79ba9d4ea5663bf43883d317bf23a267?s=128

Daniel Scully

October 10, 2012
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Transcript

  1. Daniel Scully University of Warwick

  2. Material World

  3. Periodic Table

  4. The Atom Proton Neutron Electron

  5. A Problem...

  6. Beta Decay

  7. Beta Decay E Z = E Z+1 + E e

  8. Beta Decay E Z = E Z+1 + E e

  9. Beta Decay E Z = E Z+1 + E e

  10. Neils Bohr “At the present stage of atomic theory we

    have no arguments for upholding the concept of energy balance in the case of beta-ray disintegrations.”
  11. Wolfgang Pauli “there could exist... electrically neutral particles” “in beta

    decay a (neutrino) is emitted in addition to the electron such that the sum of the energies of the (neutrino) and the electron is constant”
  12. Beta Decay E Z = E Z+1 + (E e

    + E ν )
  13. Wolfgang Pauli “I have hit upon a desperate remedy...” “I

    agree that my remedy could seem incredible...” “Thus, dear radioactive people, look and judge.” “Unfortunately, I cannot appear in Tubingen personally... because of a ball”
  14. The Atom Proton Neutron Electron Neutrino

  15. Particle Physics

  16. The Atom Proton Neutron Electron Neutrino

  17. Quarks u u d Proton

  18. Quarks u d d Neutron

  19. Standard Model

  20. Anti-Matter Standard Model

  21. Standard Model Matter Anti-Matter

  22. Forces Gravity Electro-Magnetism Strong Force Weak Force

  23. Gravity Forces Electro-Magnetism Strong Force Weak Force

  24. Neutrinos

  25. Neutrinos ν e ν μ ν τ

  26. Gravity Forces Electro-Magnetism Strong Force Weak Force

  27. Neutrino Interactions Matter Anti-Matter

  28. Neutrino Interactions ν e e- ν μ μ-

  29. Neutrino Mass ν proton

  30. Neutrinos ν e ν μ ν τ Very small masses

    Made in nuclear processes Hardly ever interact
  31. Discovery

  32. Fred Reins & Clyde Cowan

  33. Project Poltergeist

  34. Project Poltergeist

  35. Another Problem....

  36. 100 billion

  37. John Bahcall

  38. Solar Neutrinos

  39. Ray Davis

  40. Homestake Experiment ν e e- Cl Ar

  41. Solar Neutrino Problem

  42. Yet Another Problem...

  43. None
  44. None
  45. Atmospheric Neutrino Anomaly

  46. Neutrino Oscillations

  47. Neutrino Oscillations Solar ν e → ν μ Atmospheric ν

    μ → ν τ
  48. The Big Bang

  49. Neutrino Oscillations Source Flavours Solar ν e → ν e

    Atmospheric ν μ → ν μ Reactor ν e → ν e MINOS ν μ → ν μ OPERA ν μ → ν τ T2K ν μ → ν e NOvA ν μ → ν e
  50. Neutrino Beams

  51. T2K ν μ ν e

  52. Neutrinos Everywhere

  53. Geo-Neutrinos

  54. Supernova 1987a

  55. Neutrino Astronomy Optical Infra Red

  56. The Big Bang

  57. Daniel Scully University of Warwick

  58. Billion-Dollar-O-Gram

  59. J-PARC

  60. T2K ν μ ν e

  61. ND280

  62. None
  63. None
  64. None
  65. T2K ν μ ν e

  66. The Universe Matter: 5% Dark Matter: 23% Dark Energy: 72%

    Dark Matter & Energy
  67. Uncertainties 1σ – 68% 2σ – 99.5% 3σ – 99.7%

    4σ – 99.99% 5σ – 99.9999%