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Will T2KK see new physics?

Will T2KK see new physics?. Hiroaki Sugiyama. (Theory group, KEK). Ref: N. Kitazawa, HS, and O. Yasuda, hep-ph/0606013. Introduction. Future oscillation experiments search for tiny effects of. high-precision measurements of oscillation probabilities.

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Will T2KK see new physics?

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  1. Will T2KK see new physics? Hiroaki Sugiyama (Theory group, KEK) Ref: N. Kitazawa, HS, and O. Yasuda, hep-ph/0606013

  2. Introduction Future oscillation experiments search for tiny effects of high-precision measurements of oscillation probabilities Are they sensitive to also new physics? • unitarity violation near detector • non-standard interaction with source • non-standard interaction with matter • non-standard interaction with detector We consider only non-standard matter effect in model-independent way

  3. : matter density Non-standard matter effect Hamiltonian in flavor basis

  4. Low energy (ex. reactor) Medium energy (ex. T2KK) High energy (ex. neutrino factory) vacuum osc. significant effects? vacuum osc. is suppressed large non-standard effect pure measurement of oscillation parameters (in far future)

  5. is bounded stringently by experiments with charged leptons?? is allowed!! Constraint on no phases for simplicity NO! (from model-independent viewpoint) ex.: dim-8 op. with higgs indep. constraint by experiments with neutrinos S. Davidson et al., JHEP 0303, 011 (2003) A. Friedland et al., Phys. Rev. D72, 053009 (2005) large effect in T2KK?

  6. perturbation with respect to is not reliable Setup • three epsilons that can be (others are zero) • no phases • parameters are fixed • probabilities are obtained numerically for

  7. Probs. with have similar size to standard prob. with Oscillation probabilities with (off-axis) T2K can not give clear evidence for non-standard effects How about T2KK?

  8. Prob. with can be much larger than standard prob.. region for off-axis beam at a detector in Korea (a) (g) (h) clear evidence is important in this energy range

  9. gives the difference between probs. for and • Difference between and (g) (i) (g) (i)

  10. higher energy region (on-axis beam) (g) (i) (a) and are also important in this energy range

  11. T2KK(1000km) vs. MINOS(735km) ongoing exp. Non-standard effect in T2KK is larger than that in MINOS Korean detector can be placed for off-axis beam better sensitivity Even if MINOS does not see (see) the effect, there is a chance for T2KK to see (improve) that.

  12. In T2KK,can give large probability that can not be explained by the standard one with Conclusion • Even after MINOS (735km), T2KK can give new information on non-standard interactions.

  13. Backup

  14. Constraint with atm. and K2K A. Friedland et al., Phys. Rev. D72, 053009 (2005) We can read off measured value true values

  15. is possible! Silver channel in neutrino factory(3000km) (i) (g) huge enhancement!

  16. Two-flavor case ex. silver channel in neutrino factory

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