1. Contents of IDR: PPEG IDS-NF plenary meeting RAL, UK September 22-25, 2010 Walter Winter Universität Würzburg TexPoint fonts used in EMF: AAAAA A A A

2. 2 Contents  Time line/status  Some highlights from existing IDR  Beyond the IDR – towards the RDR

3. 3 Time line Scope finalized (yesterday with other WGs)

4. 4 Status/ contents of document P. Huber - Editor

5. 5 Status quo (frozen)  Presentation: Low-E and high-E NF as separate options  Migration matrices for HENF  100kt + 50kt MIND for HENF  35 kt TASD for LENF  Systematics: use established numbers to quantify effects of migration matrices  10 21 useful muon decays/year

6. Highlights from IDR (existing part – TO BE EDITED)

7. 7 Expectations until RDR Expect  13 discovery if sin 2 2  13 > 0.02

8. 8 Physics case? CPV and MH (90% CL) unlikely  Need next generation of experiments!

9. 9 HENF: optimization/robustness  4000 km + 7500 km optimal (small  13 )  Combination robust wrt  New physics  Lower luminosity  Systematics (Xsecs)  Long baseline good for  Matter effects  Atm. params  Mass hierarchy

10. 10 HENF: Performance

11. 11 Recent changes/potential  Sites only rudimentarily discussed …

12. 12 New physics constraints Sterile neutrinos at HENF  3+1 scheme: 3 additional angles  HENF (near detectors) have some sensitivity to very light sterile neutrinos, motivated by cosmology! arXiv:1007.2419

13. 13 NSI at LENF  LENF has sensitivity to new physics; platinum channel may be useful! (T. Li)

14. 14 Experiment comparison (1) Also: LBNE etc

15. 15 Experiment comparison (2) From Euronu … to be updated Competitors? No BB.. Existing Intermediate?

16. Beyond the IDR

17. 17 Issues beyond IDR   contamination; also in disappearance channel (lower E  would suppress any problems …)  Near detector, systematics  50 kt downgrade?  Triangular shaped ring?  Background versus signal optimization of MIND?  MIND on surface? + Learn how to count! (people, money, magnets, …)

18. 18 On systematics  Two storage rings: 4 fluxes; even with 2.5% flux error reasonable performance, 0.1% (ND) has small impact  Reason: Systematics correlations, not just numbers! Systematics: Have to learn lesson from reactor experiments! (Mezzetto, Schwetz)

19. 19 Staging/E  cutting points  Define cutting points wisely:  4.5-5 GeV?  12.5 GeV?  25 GeV?  Can be easily related to cost ? 4.5-5 GeV? ?

20. 20 Vision towards RDR? Cost vs physics MINDTASD 4.5 GeV1.2 IMUs? Performance: … … 12.5 GeV1.7 IMUs? Performance: … … 25 GeV2.2 IMUs? Performance: … …

21. 21 Staging scenarios?  Example: Phase I: LENF to look for  13 Phase II: Energy upgrade: find CPV? Phase III: Detector upgrade or second baseline: Precision/parameter space cov.? (blue dashed: detector mass upgrade; blue solid: second baseline; arXiv:0911.5052)

22. 22 Summary  IDR: PPEG part in good shape  Further input/updates expected within next few months (November?)  Scope/emphasis frozen  First ideas/to dos for RDR discussed  Go into open issues sections