1 / 22

High g Li/B b -Beam

High g Li/B b -Beam. Enrique Fernández-Martínez, MPI für Physik Munich Based on a collaboration with: P. Coloma, A. Donini and J. López-Pavón. The oscillation parameters. 3s. What we already know Solar sector Atm sector What we still don’t know q 13 < 12.9º d cp Mass hierarchy

Download Presentation

High g Li/B b -Beam

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. High g Li/B b-Beam Enrique Fernández-Martínez, MPI für Physik Munich Based on a collaboration with: P. Coloma, A. Donini and J. López-Pavón

  2. The oscillation parameters 3s • What we already know • Solar sector • Atm sector • What we still don’t know • q13< 12.9º • dcp • Mass hierarchy • Octant ofq23 M.C. González-García and M. MaltoniarXiv:0704.1800 3s

  3. bBeam g  100 P. Zucchellihep-ph/0107006

  4. bBeam + g  350 J. Burguet-Castell et al.hep-ph/0312068 J. Burguet-Castell et al.hep-ph/0503021

  5. bBeam Li/B Ionization Cooling g  100 Donini and E. F-M hep-ph/0603261 C. Rubbiahep-ph/0609235 C. Rubbia et al. hep-ph/0602032

  6. bBeam Li/B Ionization Cooling + g  350 S. K. Agarwallaet al.hep-ph/0610333 S. K. Agarwallaet al.hep-ph/0611233 S. K. Agarwalla et al. arXiv:0711.1459 C. Rubbia et al. hep-ph/0602032

  7. (_) (_) D 2 m D = ~ 12 = q q q q J cos sin 2 sin 2 sin 2 sol 2 E 13 13 12 23 D D æ ö 2 L m @ D = ç ÷ sol 0 . 05 23 atm 2 2 E è ø The Golden channel in matter Resonantenhancement whenwith E  6GeV Magic Baseline 7000Km Expanded in sin 2q13 < 0.4 where A. Cervera et al.hep-ph/0002108

  8. The baselines q13 = 5º d = 0, 90, -90º 7000km InvertedHierarchy 7000km Normal Hierarchy Resonant enhancement depending on the hierarchy

  9. Sensitivity to the mass hierarchy S. K. Agarwalla et al. arXiv:0711.1459 Sensitivity to the mass hierarchy down to sin2 2q13 = 10-3 for g = 350

  10. The baselines 2000km Normal Hierarchy 2000km InvertedHierarchy q13 = 5º d = 0, 90, -90º 7000km InvertedHierarchy 7000km Normal Hierarchy

  11. bBeam Li/B Ionization Cooling + C.Rubbia et al. hep-ph/0602032 g  350

  12. B And Lib-Beam fluxes We consider 3 different fluxes “Nominal” 2·1018 decays/year “Medium” 5·1018 decays/year “Ultimate” 10·1018 decays/year “Ultimate” flux at 2000km

  13. The Detector 50kt MagnetizedIronNeutrinoDetector:MIND We consider 9 bins of 1 GeVbetween 1.5-10.5 GeV 65% signal efficiency 10-4or 10-5backgrounds 2.5% and 5% or 10% and 20% systematics in signal and background Atmospheric background negligible a this energies with bunching CC charm  10-4-10-5 signal eff 0.7 CC no-charm  10-4-10-5 NC  10-4-10-5 ISS Detector WorkingGroup arXiv:0712.4129 

  14. Degeneracies at 2000km CP discovery potential signdegeneracy true solution Nominal, MediumandUltimatefluxes Loss of sensitivitytoCP violationand themasshierarchy at the 2000km baselineduetothesigndegeneracy

  15. Combining the two baselines 2000km + 7000km 2000km Nominal, MediumandUltimatefluxes Thesigndegeneracyissolved at the 7000km baseline

  16. CP discovery potential 2000km + 7000km ISS PhysicsWorkingGroup arXiv:0710.4947  Nominal, MediumandUltimatefluxes TheCP discoverypotentialwiththeUltimate and Medium flux betweenlow and highg b-Beam

  17. q13 discovery potential 2000km + 7000km ISS PhysicsWorkingGroup arXiv:0710.4947  Nominal, MediumandUltimatefluxes TheUltimateflux similar tohighg b-Beam TheMedium flux betweenlow and highg b-Beam TheNominal flux similar toSuper-Beams

  18. Sensitivity to the mass hierarchy 2000km + 7000km ISS PhysicsWorkingGroup arXiv:0710.4947  Nominal, MediumandUltimatefluxes AllthefluxesworsethantheoptimumNF butbetterthantheotherfacilities

  19. Systematics and Backgrounds Effect of Systematycs Effect of Background 2.5/5% and 10/20%systematic error considered 10-5and 10-4backgroundconsidered Impact of the background and the systematic errors very small Performance limited by statistics No improvement if background is lowered below 10-5

  20. Conclusions • Strong complementarity between the two baselines • 2000km detector very sensitive to d but spoiled by sign degeneracies • 7000km detector resonant dependence on the mass hierarchy and no dependence on d solves degeneracies • With Medium flux sensitivity to q13, dand the mass hierarchy down to sin2 2q13 3·10-4 • Impact of the background and the systematic errors very small. Performance limited by statistics

  21. The ionization cooling procedure C.Rubbia et al. hep-ph/0602032 • 7Li + D →8Li + p • 6Li + 3He →8B + n An excess of 1014 ions/s could be accumulated

  22. Event Rates For 10yr exposure of each beam to a 50kt iron detector sin2 2q13= 0.01

More Related