2. Alpha decay

3. Beta decay

4. Henri Bequerel

5. Pierre and Marie Curie

6. electron n

7. W. Pauli -NEUTRINO- “ I invented a new Particle, which Will never be Seen! “

8. electron

10. Dear Radioactive Ladies and Gentlemen !

11. 1956: discovery of the neutrino Savannah river reactor

12. (Fred Reines – Clyde Cowan)

13. n-capture by cadmium

14. Fermi interaction f Enrico Fermi

16. direct interaction ~ four fermions p n electron antineutrino beta decay

17. Parity conserved in strong and electromagnetic interactions

18. C. N. Yang T. D. Lee

19. Chien-Shiung Wu Experiment Columbia University

20. lefthanded fermion S= - 1/2 righthanded fermion S = + 1/2

21. weak interactions current-current interaction weak currents => lefthanded Feynman / Gell-Mann Marshak / Sudarshan

22. R. Marshak G. Sudarshan

23. maximal breaking of parity

26. weak bosons high mass mass generation ?

28. electro-magnetism

29. electroweak gauge theory gauge group SU(2) x U(1) doublet singlet

30. doublet singlet => neutrinos massless

32. Z => neutral current

35. Gargamelle bubble chamber

38. 1975 => three different neutrinos

39. Standard - Theory

40. III II I

41. ??? weak bosons ???

42. SPS proton-antiproton collider

44. 1984 Discovery of weak bosons

46. The first Z-boson, decaying into an electron and a positron

47. Carlo Rubbia

48. LEP

51. Masses of weak bosons ??????????

54. rotation symmetry

55. symmetry of rotation broken (spontaneous symmetry breaking)

56. spontaneous symmetry breaking field theory

64. Peter Higgs - 1964Erwin Schrödinger - 1952

65. Kibble Guralnik Hagen Englert Brout

72. Discovery of „Higgs“-particle ? ? ?

73. L3 I ATLAS CMS LHCb Alice

76. H

79. M(H) = 125,36 ±0,37(stat.) ±0,18 (syst.) GeV

80. one W or Z must be virtual, since M(H) < 2 M(W,Z)

81. flavor mixing quarks

83. 83

84. ( u d s )( u u d ) s  u

86. Nicola Cabibbo 1963

88. strangeness changing term not observed in the experiments (decay of K-mesons) !!!

89. GIM – mechanism ( Glashow, Iliopoulos, Maiani ) c: charmed quark 1970

91. III II I

95. SU(2,L) x U(1) SU(2,L) x sU(2,R) x U(1)

99. III II I

100. 6 leptons – 6 quarks 3 doublets

101. flavormixing

102. weak transitions

104. observed CKM – matrix (no phasees)

107. New parametrization:

119. flavor mixing Leptons

120. 6 leptons

121. massive neutrinos

122. flavormixing

124. Neutrino oscillations

129. observation

131. neutrino masses ( eV )

132. 0.048 0.012 0.003 0.01 eV 0.05 eV

133. ??????????????? neutrino masses very small ???????????????

137. Neutrinoless Double Beta decay

141. Majorana neutrino mass: < 0.23 eV

142. Beyond Standard Theory ??????????

143. ? Grand Unification ? ? Gravity ? ? Supersymmetry ? ? String Theory ? ?…………………?