1 / 32

Measuring CP violating phase from long baseline neutrino experiments

Measuring CP violating phase from long baseline neutrino experiments. Naotoshi Okamura (YITP, Kyoto Univ.) ICFP2005 Oct. 07, ’05 @ NCU. plan. short review until now between CP phase and the others 8 fold ambiguity effect of matter delete, 3m : mixing, mass, matter how to delete

etoile
Download Presentation

Measuring CP violating phase from long baseline neutrino experiments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Measuring CP violating phase from long baseline neutrino experiments Naotoshi Okamura (YITP, Kyoto Univ.) ICFP2005 Oct. 07, ’05 @ NCU

  2. plan • short review • until now • between CP phase and the others • 8 fold ambiguity • effect of matter • delete, 3m : mixing, mass, matter • how to delete • Yet Another Problem, error • one example • summary

  3. short review

  4. neutrino masses m1 m2 m3 flavor mixing angles 12 23 13 CP phase  Majorana phases 1 2 parameters (3flavor) neutrino physics 7/9 parameters neutrino oscillation 6 parameters • squared-differences • m212m213(m23-m21) • flavor mixing angles • 12 23 13 • CP phase •  • Majorana phases • nothing

  5. until today • Solar Neutrino (SK, SNO, KamLAND(reactor)) • e! e (anti-e! anti-e) • Atmospheric Neutrino (SK, K2K(LBL)) • !(anti-! anti- ) • Reactor Neutrino (CHOOZ, PaloVarde) • anti-e! anti-e Discard : LSND only survival probability & 2-flavor analysis even function of  and m2

  6. mass squared difference MNS matrix independent parameters relation to experiments notations

  7. categorize full 100% (12<45) (>0) solar, matter effect helps (23<>45) (<>0) half 50% atmospheric, even function non 0% (<0.16) (no) unknown, will be measured

  8. unobserved parameters 2 fold ambiguity sign of m213 2 fold ambiguity value of 23 (octant) 2 fold ambiguity 3 ambiguity “best fit” is 23 =45 : no octant ambiguity

  9. CP phase and the others

  10. CP phase and mixing combination of mixing angles and CP phase flavor changing case P(!e) : realistic mode in near future. Ue3 : unknown, important to measure CP phase

  11. CP phase vs. mixing angles combination of mixing angles and CP phase e.g. 0.16 0.10 L = 295 km, without matter effect If we do not know the value of 13, we cannot determine the CP phase.

  12. even odd CP phase and mass hierarchy e combination of “sign of13” and “cos ”

  13. CP phase and matter Disturbed by the matter effect. Combination of mixing angles and CP phase. Mixing angles are changed by matter effect. If we do not know the matter profile correctly, we cannot estimate the CP phase, correctly.

  14. matter effect disturb CP phase and the others

  15. 3mmixing anglesmass hierarchy matter effect

  16. mixing angle flavor conserving case insensitive : slightly depend on CP phase, via MNS elements. P(e!e) : independent of CP Reactor experiments are independent of CP phase KASKA, DayaBay, Double Chooz, and so on.

  17. 2mmixing anglesmass hierarchy matter effect

  18. A>>B mass hierarchy 1 matter effect helps us

  19. mass hierarchy 2 We can determine mass hierarchy independently, if matter effect is large. When L/E is fixed at oscillation maximum, L>1000 km : matter effect term dominate L<1000 km : CP phase term dominate

  20. CERN J-PARC FNAL neutrino world J-PARC – SK ( 300km) and – Korea (1000km)

  21. 1mmixing anglesmass hierarchymatter effect

  22. matter effect • matter effect disturbs CP phase measurement. • helps to determine the mass hierarchy. • makes difference between and anti- . If we know the matter profile “precisely”, matter effect will not be a big problem. Cheer UP!! Geologist !!

  23. 0mmixing anglesmass hierarchymatter effect

  24. CP phase and the others reactor 1000km matter effect disturb Geologist

  25. Japan && Korea»one example» way to CP phase hep-ph/0504061, with K.Hagiwara, K.i.Senda

  26. 50 GeV Proton Synchrotron 1021 POT/year Intensity of neutrino O(2) higher than K2K 50Kton water Cherenkov detector fiducial volume : 22.5Kton good e/ identification cannot measure the charge Tokaimura-to-Kamioka (T2K) • J-PARC (http://j-parc.jp/index.html) • SK (http://www-sk.icrr.u-tokyo.ac.jp/index.html) L=295 km

  27. Super-K J-PARC S-Korea Neutrinos will go to Korea OAB : cone, umbrella L=295km,  =2.0-3.0 L=1000-1200km,  =1.0-4.0 2.5@SK

  28. 3.0@SK today’s choice for hierarchy, angle and place. true : “normal” fit : “inverted” true : sin2213= 0.1  free : fit  = 0.0  free

  29. two distance is better than one SK only Korea only Combine BAD SO,SO GOOD true : sin2213 = 0.06, CP : n£90o fit : sin2213 = horizontal, CP : freely • SK only • bad • no matter • Korea only • not bad • w/o reactor, difficult • Combine • Better !!

  30. CP phase Ue3:freely normal hierarchy We can determine CP phase more, if Ue3 is measured.

  31. summary • CP Phase vs. 3m • mixing angles, mass hierarchy, matter effect • mixing angle (Ue3:unkown) • reactor experiment • mass hierarchy • 1000km is turning distance. • matter effect • not so bad guy. helps us. • Cheers UP!! Geologist !! • Japan-Korea experiment !e and !

  32. Thank you for your attention

More Related