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Physics and Performance Evaluation Group: Status and plans

Physics and Performance Evaluation Group: Status and plans. IDS-NF Plenary meeting RAL, United Kingdom January 17, 2008 Walter Winter Universität Würzburg (somewhat biased view) on behalf of the executive committee: Andrea Donini, Patrick Huber, Silvia Pascoli, Walter Winter, Osamu Yasuda.

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Physics and Performance Evaluation Group: Status and plans

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  1. Physics and PerformanceEvaluation Group: Status and plans IDS-NF Plenary meeting RAL, United Kingdom January 17, 2008Walter WinterUniversität Würzburg (somewhat biased view) on behalf of the executive committee:Andrea Donini, Patrick Huber, Silvia Pascoli, Walter Winter, Osamu Yasuda

  2. Contents • PPEG mandate • Status and IDS baseline • Test of alternative setups: The PPEG‘s playground • Comparison to competitors • Website, Euronus • Plans IDS-NF@RAL - PPEG

  3. IDS Physics and Performance Evaluation Group (PPEG) • … will continue the activities of the ISS physics working group. • First phase: focus on the performance of the various neutrino facilities. At a later stage: focus shifted towards the physics case for a neutrino factory • Executive committee: Andrea Donini, Patrick Huber, Silvia Pascoli, Walter Winter, Osamu Yasuda • Tasks: • Coordinate physics performance study • Website • Interface with accelerator and detector WG • (possibly) Workshops • Report IDS-NF@RAL - PPEG

  4. From ISS to IDS ISS physics IDS PPEG Theory Optimization/parameters forstandardphysics Here? Phenomenology TIME Experimental Additions forNS physics/requirementsfor muon experiments Muon physics REPORT Concise physics case IDS-NF@RAL - PPEG

  5. Why need another physics WG? • Baseline design has to be evaluated and further developed in discussion with other WGs • Evaluation of new ideas, especially for large q13,such as NF+SB, NF-SB, off-axis NF, etc. • Comparison to alternatives: beta beams etc. • Define requirements for non-standard physics measurements, e.g., silver channel, etc. • Include requirements for muon physics and how these interact with the oscillation program • … Physics performanceevaluation (initial phase) IDS-NF@RAL - PPEG

  6. Physics performance evaluation • Main purpose of the PPEG:Evaluate the physics performance of a given experimental setup (neutrino factory or other, existing or planned) in a transparent, consistent and documented fashion. • Transparent: Clearly state • Definition of performance indicator • Approximations used • Chosen input parameters, luminosity etc. • Confidence level • Treatment of systematics • Consistent: Assumptions should be on equal footing • Documented: Relevant information will be archived and will be accessible. Use of a website. IDS-NF@RAL - PPEG

  7. Definition of parameters • Neutrino factory setup: all the parameters are defined in strict collaboration with the detector and accelerator WG of the IDS • Need of a defined and efficient communication between the various WGs (steering group?) • There will be different types of setups: a) Baseline setup: stable, agreed design b) Conservative modification of 1. – e.g. different baseline etc. g) Speculative ideas, e.g. new ideas • Beta beam setups: possibly follow a similar procedure as for neutrino factory, working in collaboration with beta-beam groups; yet undefined! • Super-beam setups: use of existing literature and input of well-established and recognized experts IDS-NF@RAL - PPEG

  8. Status • First version of baseline setup evaluated • First version of webpage online • Start of discussion of requirements for non-standard physics • Keep track of new developments, such as low-E neutrino factory • Keep track of „competitors“, e.g., achievable beta beam luminosities IDS-NF@RAL - PPEG

  9. IDS baseline setup ? • IDS baseline 0.10evaluated! P. Huber(plenary) IDS-NF@RAL - PPEG

  10. IDS baseline: Luminosity • Luminosity ~ Useful muon decays x detector mass x running time • Luminosity critical for • Physics potential • Optimization Accelerator Detector(s) IDS-NF@RAL - PPEG

  11. IDS baseline: other critical parameters • Detection efficiencyversus backgrounds:Is it better to have smaller BGs (small q13?) or higher efficiencies (large q13?) • How small can the threshold be? • Impact of systematics? IDS-NF@RAL - PPEG

  12. IDS baseline iteration procedure?… from the PPEG point of view • Avoid quick changes; changes should be adiabatic • Change request from working group as a whole • Twice-a-year (?) review of baseline setup by steering group? • Each change with significant impact on physics potential has to be justified • Session in plenary meeting devoted to discussing changes of baseline? • Specific responsible persons from each WG? IDS-NF@RAL - PPEG

  13. b/g-setups: The PPEG‘s playground? • PPEG needs some mechanism to evaluate and compare to • Modifications/the optimization of the IDS baseline from the physics point of view • New developments (such as low-E neutrino factory) • Competitors • Here: b-setups for modifications (such as different baseline), g-setups for new developments • The mechanism how to choose competitor setups (superbeams, beta beams) needs some refinement, possibly in collaboration with Euronus IDS-NF@RAL - PPEG

  14. Example (b): Choice of std. baselines? • All regions:Sensitivity for sin22q13>10-4.2 (5s) for the shown performance indicator • Compared to IDS baseline: ~ factor 2 higher luminosity, Em =50 GeV • Robust optimum for ~ 4000 + 7500 km(not <= 3000 km!) Preliminary How does that looklike for IDS baseline? IDS-NF@RAL - PPEG (Kopp, Ota, Winter, in prep.)

  15. Example (b): Minimum Em for NSI? • Higher muon energy helps; low-E NF not an option • Silver channel: Not relevant for IDS baseline; helps for Em ~ 50 GeV IDS baseline? High-E NF IDS baseline? High-E NF Preliminary (Kopp, Ota, Winter, in prep.) IDS-NF@RAL - PPEG

  16. Example (g): Low-energy NF BASIC: (5 years)  (3  1020 useful decays/yr)  (2 signs)  (20Kt fid. Mass) = 31022 Kt-decays(2 signs) BETTER: (10 years)  (5  1020 useful decays/yr)  (2 signs)  (20Kt fid. Mass) = 11023 Kt-decays(2 signs) Excellentthreshold! Em ~ 4 GeV • Red (no backgrounds) • Dotted - 1 X 1023 KT-years • Solid – 3 X 1022 KT-years • Black (Background @ 10-3) • Short dash - 1 X 1023 KT-years • Long dash – 3 X 1022 KT-years Talk by Alan Bross IDS-NF@RAL - PPEG

  17. Comparison to „competitors“: Superbeams • Superbeam upgrades could compete with neutrino factory for large q13 • For large q13, CP violation is the only relevant matter! • But, Huber: Super-beams are „super“ not only because of the target power, detector mass etc., but also because of the price! Talk byP. Huber IDS-NF@RAL - PPEG

  18. Beta beams: Luminosity? + spallation F r 2 0 1 1 GeV p fragmentation + + U 2 3 8 L i X 1 1 fission n + + p C s 1 4 3 Y Talk byM. Lindroos Factor of 10beyond currentstd. luminosities? RAL January 2008 Beta-beam requirements, 18 • ISOL method at 1-2 GeV (200 kW) • >1 10136He per second • <8 101118Ne per second • 8Li and 8B not studied • Studied within EURISOL • Direct production • >1 1013 (?) 6He per second • 1 101318Ne per second • 8Li and 8B not studied • Studied at LLN, Soreq, WI and GANIL • Production ring • 1014 (?) 8Li • >1013 (?) 8B • 6He and 18Ne not studied • Will be studied in the future The beta-beam task, EURISOL

  19. Higher g beta beams q13 = 5º d =0, 90, -90º 2000km + 7000km 7000km Normal Hierarchy • g ~ 350 CERN implementationwith two baselines Peak of spectrum ~matter resonance E 7000km Inverted Hierarchy “Nominal” 2·1018 decays/year “Medium” 5·1018 decays/year “Ultimate”10·1018 decays/year IDS-NF@RAL - PPEG E. Fernandez-Martinez

  20. Systematics task force? • Knowledge on crosssections better for high than low neutrino energies • Important issue especially for superbeams • How does that look like for a neutrino factory?What SG/BG uncertainties do we expect? Talk by M. Sorel From P. Huber‘s talk IDS-NF@RAL - PPEG

  21. PPEG Website • The PPEG has already setup a website:http://www.ippp.dur.ac.uk/ids/ • Webpage to do: • Incorporate and document IDS baseline;possibly: glb-files (GLoBES), curves as data? • Discuss and document b and g setups • Cross-links to useful documents? • Move together with main IDS site??? IDS-NF@RAL - PPEG

  22. Connection to Euronus A. Donini IDS-NF@RAL - PPEG

  23. Questions to be addressed • Robustness of conclusions wrt luminosity etc.? • Does the far baseline detector have to be as good as MIND? What about the luminosity splitting? • Why did the performance become worse for large q13? How to fix that? • Two baseline optimization? • Minimum muon energy for NSI, silver channel, near detector physics (such as pol. structure functions)? • Physics case for silver detector? • Large q13 strategy: how to deal with Double Chooz etc.? • Include more theory people to support physics case? IDS-NF@RAL - PPEG

  24. Plans until NuFact • Update website • Two-baseline optimization, NSI requirements • Check baseline: performance for large q13, etc. • Possibly add figures for other performance indicators (such as q23, Dm312) • Follow developments for beta beams, superbeams, etc. • Possibly provide figures for different detector systematics (BG versus threshold) • Possibly provide figures with competitor comparison IDS-NF@RAL - PPEG

  25. Summary and conclusions • Mandate: Continutation of ISS, focus on physics performance • First version of ISS baseline evaluated • Baseline optimization, muon energy requirement have to be checked • Several procedure/strategies should be thought over: • Baseline iteration (with other WGs) • Large q13 strategy • Physics case for the ECC • Selection of competitor setups • Inclusion of theory at earlier stage? • Create a „systematics task force“? How does that relateto Euronu? IDS-NF@RAL - PPEG

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