Contents of IDR: PPEG

IDS-NF plenary meetingRAL, UKSeptember 22-25, 2010

Walter Winter

Universität Würzburg

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Contents

Time line/status Some highlights from existing IDR Beyond the IDR – towards the RDR

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Time line

Scope finalized(yesterday with other WGs)

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Status/contents of document

P. Huber - Editor

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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

Highlights from IDR

(existing part – TO BE EDITED)

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Expectations until RDR

Expect 13 discovery if sin2213 > 0.02

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Physics case?

CPV and MH (90% CL) unlikelyNeed next generation of experiments!

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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

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HENF: Performance

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Recent changes/potential

Sites only rudimentarily discussed …

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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

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NSI at LENF

LENF has sensitivity to new physics; platinum channel may be useful!

(T. Li)

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Experiment comparison (1)

Also: LBNE etc

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Experiment comparison (2)

From Euronu … to beupdated

Competitors?No BB ..

Existing

Intermediate?

Beyond the IDR

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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, …)

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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)

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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?

?

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Vision towards RDR?

Cost vsphysics

MIND TASD

4.5 GeV 1.2 IMUs?Performance: …

…

12.5 GeV 1.7 IMUs?Performance: …

…

25 GeV 2.2 IMUs?Performance: …

…

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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)

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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

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