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Highlights and Insights from the IDR PPEG Meeting - September 2010

This document summarizes key outcomes and discussions from the IDR plenary meeting held in the UK from September 22-25, 2010, led by Walter Winter from Universität Würzburg. It covers the status of the IDR, highlights from existing documents, and future expectations leading towards the RDR. Topics include migration matrices for high-energy neutrino facilities, optimization strategies, and considerations for new physics experiments. Key issues such as systematics, staging scenarios, and the need for next-generation experiments are also presented.

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Highlights and Insights from the IDR PPEG Meeting - September 2010

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

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

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

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

  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 • 1021 useful muon decays/year

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

  7. Expectations until RDR Expect q13 discovery if sin22q13 > 0.02

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

  9. HENF: optimization/robustness • 4000 km + 7500 km optimal (small q13) • Combination robust wrt • New physics • Lower luminosity • Systematics (Xsecs) • Long baseline good for • Matter effects • Atm. params • Mass hierarchy

  10. HENF: Performance Preliminary

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

  12. New physics constraintsSterile 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. NSI at LENF • LENF has sensitivity to new physics; platinum channel may be useful! (T. Li)

  14. Experiment comparison (1) Also: LBNE etc

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

  16. Beyond the IDR

  17. Issues beyond IDR • nt contamination; also in disappearance channel (lower Em 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. 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. Staging/Em 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. Vision towards RDR?

  21. Staging scenarios? • Example:Phase I: LENF to look for q13Phase 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. 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

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