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General motivation

S. Geer, K. Long. Charge: (July collaboration meeting) Neutrinos and our lives (PR motivation) Neutrino oscillation and the role of NuFact Other physics at Neutrino Factor complex and muon collider Neutrino factory description (the accelerator)

stephanie-snider
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General motivation

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  1. S. Geer, K. Long • Charge:(July collaboration meeting) • Neutrinos and our lives (PR motivation) • Neutrino oscillation and the role of NuFact • Other physics at Neutrino Factor complex and muon collider • Neutrino factory description (the accelerator) • Role of cooling in Neutrino Factory and muon collider, the need for MICE General motivation

  2. Neutrinos and our lives: • The Neutrino Factory; the ultimate tool: • Neutrinos from decay of stored muons: intensity, beam composition, known and variable energy • Step on the way to muon collider: perhaps the route of choice to multi-TeV lepton-lepton collisions Recent observations imply neutrinos have mass and mix: • The Standard Model is incomplete astrophysicalconsequences! • Neutrino abundance and neutrino mass: mass in neutrinos ~ that of visible stars • CP violation in lepton sector: Lepto-genesis cosmological consequences! Birth of a new technique for particle physics

  3. Neutrino oscillations: status n3 Dm223 n2 n1 Dm223 n2 n1 Dm212 n3 Dm212 CP-violation:   0 Solar Atmos.

  4. Status (cont.): Important for CP-violation search

  5. Planned/proposed experiments: … comment on: 2004 2005 2006 2007 2008 2009 CHOOZ <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 MINOS  <0.085 <0.06 <0.049 <0.042 CNGS*  <0.067 <0.047 <0.039 CNGSx1.5*  <0.056 <0.039 <0.033 Low energy CNGS ?  <0.040 <0.028 JHF-SK  <0.013 Indication of time-line P. Migliozzi •   x: K2K, MINOS, CNGS (also    *) J2K, NuMI off axis, CNGS off axis, superbeam • e  x: SNO, Kamland, GNO, Borexino, -beam * Designed for nt appearance

  6. Neutrino Factory cf. conventional sources:

  7. NuFact cf. conventional sources (cont.):

  8. Other physics at the Neutrino Factory • High precision -p and -n DIS • PDFs: complete flavour decomposition • Nuclear shadowing • S from xF3 - S~0.003 • |Vcd| and |Vcs|, D0/ D0 mixing • sin2W - sin2W ~ 0.0001 • Polarised structure functions • Beyond the SM searches Deep inelastic scattering Crucial:-N cross-sections for -oscillation measurements

  9. Other physics at the Neutrino Factory (cont.) ‘Other’ physics • Arising from high muon flux • Rare (FL-violating) decays • GSW parameters • Search for CP, T and CPT • Muonium (, m, ) • Muonic atoms (rN, weak interaction) • -spin rotation (condensed matter physics) • Arising from high proton flux • Nuclear physics (heavy nuclei, exotic nuclei) • Nuclear astrophysics • Atomic physics • Medicine • Materials • CVC-hypothesis in beta decay

  10. Neutrino flux: The key to success at NuFct Short muon lifetime requires novel technique:IONISATION COOLING • Physics reach increases with neutrino flux • Maximise stored muon intensity • Implies: • Require to capture and store as many of the ‘decay’ muons as possible Cool muon beam

  11. Ionisation cooling Principle Practice

  12. Neutrino factory cooling channel CERN cooling channel • Ionisation cooling complicated in principle and in practice • Cooling effect comes from delicate balance between cooling (dE/dx) and heating (MCS) • To achieve required cooling (at least a factor of 10) requires a LONG channel • Require to demonstrate cooling works in principle (MuScat) and in practice - MICE

  13. Muon ionisation cooling experiment • Mission statement: • Design, build, commission and operate a realistic section of cooling channel • Measure its performance in a variety of modes of operation and beam conditions i.e. the results of MICE will allow design of Neutrino Factory complex to be optimised with confidence.

  14. Status of draft: S. Geer More to do. Progress this week! Deadline 15Nov02

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