1 / 35

A Guess at the Status of Neutrino Oscillation Physics in 2020

A Guess at the Status of Neutrino Oscillation Physics in 2020 . 1 st European Hyper Kamiokande Meeting QMUL, London Dec. 18 th , 2013. Dave Wark Oxford University/RAL. Three neutrino mixing. Complicated equation means covariances and degeneracies!.

bao
Download Presentation

A Guess at the Status of Neutrino Oscillation Physics in 2020

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. A Guess at the Status of Neutrino Oscillation Physics in 2020 1st European Hyper Kamiokande Meeting QMUL, London Dec. 18th, 2013 Dave Wark Oxford University/RAL

  2. Three neutrino mixing. Complicated equation means covariances and degeneracies! CP sensitivity mainly because this term flips sign for n and anti-n If only two neutrinos contribute: Need Matter effects to get the signs of Dm2ij

  3. How do we know q12, Dm12? SNO LETA and 3-Phase KamLAND Ishidoshiro, this conference. MSW effect! Raaf, this conference. Super Kamiokande D/N!

  4. Super Kamiokande How do we know q23, Dm23? K2K MINOS Beam and Atm. T2K Disappearance

  5. How do we know q13, Dm13? Double Chooz RENO T2K Appearance Daya Bay rate plus shape

  6. Latest Global Fit, shown tomorrow by Lisi

  7. We are left with 4 questions for 3n… What is the MH? What is d? What is q23? 4th Question – Is this all there is? Halzen’s Rule – 1s is an error bar, not a discovery

  8. Why do we need 5s? • There is no calculation that you do which tells you that what you need to discriminate against wrong results is to find 5s. • The editors of PRL just got tired of arguing with authors who wanted to title their articles “Discovery of X” on the basis of a 2.2s excess, so they decreed 3s is evidence, 5s is a discovery. • We don’t have to agree. • The fact remains that the history of our field is littered with wrong results – my first exposure to n physics was Reines et al. “discovering” neutrino oscillations, as did Bugey, and about a dozen other experiments, and there was Lubimov’sn mass and the 17 keV neutrino and at least a dozen others – superluminal neutrinos come from a proud tradition of n anomalies. • n experiments are hard – so why do we believe the current crop?

  9. How do we know q12, Dm12? SNO LETA and 3-Phase KamLAND Ishidoshiro, this conference. Clearly seen with reactor n! MSW effect Raaf, this conference. Clearly seen with solar n! Super Kamiokande D/N

  10. Super Kamiokande How do we know q23, Dm23? K2K Clearly seen with atmospheric n! Now seen by Icecube/ANTARES as well. MINOS Beam and Atm. T2K Disappearance Clearly seen with accelerator n! Also seen by OPERA in appearance.

  11. How do we know q13, Dm13? Double Chooz RENO Clearly seen with reactor n! T2K Appearance Clearly seen with accelerator n! Daya Bay rate plus shape

  12. Which experiment should we do? • I think that is the wrong question. • The right question is: How many, and which experiments do we need to do to have complementary confirmations for the answers to all the big questions. • Another thing to emphasize is multiple observables or techniques within each of the experiments (if possible). • The SNO experiment was never going to be repeated, so we measured the critical NC signal three different ways within the same experiment. • So what new experiments will help us answer these questions?

  13. MH effect increases with baseline, CP effect is ~roughly constant. Note size of CP effect in second maximum…

  14. # Assume we will get ~7.8 x 1021 p.o.t. by 2020

  15. The NOvA Experiment

  16. MH Sensitivity dCP Sensitivity T2K + NOvA + Reactor Constraints.

  17. MH Sensitivity dCP Sensitivity nm Disappearance Only T2K, but full T2K Statistics

  18. MH Sensitivity dCP Sensitivity Octant Sensitivity T2K + NOvA + Reactor Constraints.

  19. Many are called to measure the MH: PINGU

  20. Many are called to measure the MH: INO

  21. Many are called to measure the MH: JUNO

  22. Many are called to measure the MH: JUNO

  23. We also have an anomaly from LSND...

  24. We also have an anomaly from LSND... Not universally agreed to have been seen by LSND Not seen by KARMEN… Luckily the MiniBooNE experiment at Fermilab was built to provide a clear resolution… .....ooohhh.

  25. Sterile Indications… Short baselines (L/E ~ 1) and Sterile n. MiniBooNE says.... No! Latest… Yes?

  26. Another proposal to test at FNAL with LAr1… This may or may not be sorted out by 2020.

  27. Conclusions • Existing experiments have proven that neutrino oscillate and measured all the angles and mass differences (although more precision is needed). • We are left targeting the MH, the octant, and especially CP violation (and looking for deviations, of course!). • Over the next ~10 years we will almost certainly get much new data from T2K and NOvA and the reactor experiments Daya Bay, RENO, and Double Chooz. • We may also get new data from some combination of PINGU, INO, JUNO, and various sterile neutrino experiments. • We may have a much better idea of the MH and the octant by then, however we won’t have any more than hints (at best) on CP violation. • We will therefore need a large experiment targeted on CP violation!

More Related