Michel Gonin – Ecole Polytechnique – France. 1987 : SUPER NOVA SN1987A Super-Kamiokande...

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Michel Gonin Ecole Polytechnique France 1987 : SUPER NOVA SN1987A Super-Kamiokande Introduction neutrino oscillations mixing matrices Introduction neutrino oscillations mixing matrices 26 free parameters including 8 for neutrinos electron neutrino c = cos s = sin ? The last mixing angle 13 was missing before 2012 The complex phase is still unknow The last mixing angle 13 was missing before 2012 The complex phase is still unknow Measurements of the matrix elements 12 = 33.6 1.0 23 = 45 6 CP violation 0 " for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature". 3 generations of particles 3 mixing angles, all different from zero. masse states flavor states World (new) baseline oscillation experiments beam beam Intense beam Near detectors Huge far detector sin 2 2 disappearance m 23 2 sin 2 2 e appearance T2K main physics goals Probe to e oscillations with sensitivity improvement Precise measurement of the atmospheric parameters 23, m 32 2 How do we detect neutrinos ? Neutrino interaction with some unrelated muon (rock muon) Charge current quasi elastic neutrino interaction n p e e n p e e e n p e e n p e n p e e n p e e e n p e e n p e n p n p Feb. 3, 2009 Target Station Feb. 3, 2009 HornsHorns 16 Inside the decay tunnel Non accelerator experiments (reactor) Exclusion for non zero - number of sin 2 (2 13 sin 2 (2 13 ) appearance 13 = 9.1 0.6 e appearance e appearance Discovery of neutrino appearance in flavor oscillations New results e disappearance e disappearance New results 2013 First indication for strong CP violation in the lepton sector ? New results 2013 NOVA CP phase Perspectives Perspectives Is CP violated strongly in neutrino oscillation ? Is the source of the violation due to complex phase associated with 3 generations ? Only 3 generations for leptons ? Sterile neutrinos ? Unitary triangle and physics beyond the standard model High power accelerator and huge detector needed Asymmetry of neutrino and anti-neutrino induced by interaction in matter is large Measurement of 13 C=cos S=sin Merci beaucoup Joe !