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New results from neutrino oscillation experiments

New results from neutrino oscillation experiments. Michel Gonin – Ecole Polytechnique – France. Introduction neutrino oscillations mixing matrices . The experiments New results on Θ 13 Perspectives. 1987 : SUPER NOVA SN1987A Super- Kamiokande.

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New results from neutrino oscillation experiments

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  1. New results from neutrino oscillation experiments • Michel Gonin – Ecole Polytechnique – France

  2. Introduction neutrino oscillations mixing matrices The experiments New results on Θ13 Perspectives 1987 : SUPER NOVA SN1987A Super-Kamiokande

  3. New results on neutrino oscillations

  4. The Standard Model of Particle Physics 26 free parameters including 8 for neutrinos electron neutrino

  5. The Mixing Matrix c = cos s = sin The last mixing angle 13 wasmissing before 2012 The complex phase δ is still unknow ? ≈

  6. Measurements of the matrix elements θ12=33.6◦± 1.0◦ • θ23= 45◦± 6◦

  7. "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature".  masse states  flavor states  3 generations of particles  3 mixing angles, all different from zero. CP violation δ 0

  8. World (new) baseline oscillation experiments

  9.  Intense beam  Near detectors  Huge far detector nmbeam

  10. T2K main physics goals • Probe νμ to νe oscillations with sensitivity improvement • Precise measurement of the “atmospheric” parameters q23, Dm322 sin22q13 nmdisappearance neappearance sin22q23 Dm232

  11. n p  e  e en p  e How do we detect neutrinos ?  n p   Charge current quasi elastic neutrino interaction Neutrino interaction with some unrelated muon(“rock muon”)

  12. Target Station Feb. 3, 2009

  13. Horns Feb. 3, 2009

  14. Inside the decay tunnel

  15. Nonacceleratorexperiments (reactor)

  16. θ13= 9.1◦± 0.6◦ 2010 - 2012 “appearance” Exclusion for non zero - number of  sin2(213)

  17. New results neappearance Discovery of neutrino appearance in flavor oscillations

  18. New results • nedisappearance

  19. New results 2013

  20. New results 2013 First indication for strong CP violation in the lepton sector ?

  21. Perspectives CP phase δ NOVA

  22. Is CP violated “strongly” in neutrino oscillation ? • Is the source of the violation due to complex phase associated with 3 generations ? • Only 3generations for leptons ? Sterile neutrinos ? •  Unitary triangleand physics beyond the standard model

  23. High poweraccelerator and hugedetectorneeded • Asymmetry ofneutrinoand anti-neutrino inducedbyinteraction inmatter islarge

  24. Measurement of 13 C=cos S=sin

  25. Merci beaucoup Joe !

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