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
arXiv:
JHEP 0805:050,2008

2. bBeam g  100 P. Zucchelli hep-ph/0107006
B. Autin et al. physics/

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

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

5. bBeam + g  350 Li/B S. K. Agarwalla et al. hep-ph/0610333
C. Rubbia et al. hep-ph/
S. K. Agarwalla et al. hep-ph/
S. K. Agarwalla et al. hep-ph/
S. K. Agarwalla et al. arXiv:

6. The Golden channel in matter
(_)
Resonant enhancement
when with E  6GeV
Magic
Baseline
7000Km
Expanded in 04 . 2 @ ÷ ø ö ç è æ D L
sol
sin 2q13 < 0.4
where E m
atm 2 23 D = E m
sol 2 12 D = 23 12 13 2
sin
cos ~ q = J
A. Cervera et al. hep-ph/

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

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

9. bBeam + g  350 Li/B P. Coloma et al. arXiv:0712.0796
S. K. Agarwalla et al. arXiv:

10. B and Li b-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

11. 50kt Magnetized Iron Neutrino Detector: MIND
The Detector
50kt Magnetized Iron Neutrino Detector: MIND
We consider 9 bins
of 1 GeV between
GeV
65% signal efficiency
10-4 or 10-5 backgrounds
2.5% and 5% or
10% and 20%
systematics in signal and background
Atmospheric background negligible a this energies with bunching
CC charm 
signal
eff  0.7
CC no-charm 
NC 
ISS Detector Working Group arXiv:  

12. Degeneracies at 2000km CP discovery potential sign degeneracy
true solution
sign degeneracy
Nominal, Medium and Ultimate fluxes 3s
Loss of sensitivity to CP violation and the mass hierarchy
at the 2000km baseline due to the sign degeneracy

13. Combining the two baselines
2000km km
2000km 3s
Nominal, Medium and Ultimate fluxes
The sign degeneracy is solved at the 7000km baseline

14. CP discovery potential
ISS Physics Working Group arXiv:  
2000km km
LENF
BLiBB 3s
Nominal, Medium and Ultimate fluxes
The CP discovery potential with the Ultimate
flux between high g b-Beam and SBEAMS

15. q13 discovery potential 2000km + 7000km 3s
ISS Physics Working Group arXiv:  
2000km km
LENF
BLiBB 3s
Nominal, Medium and Ultimate fluxes
The Ultimate flux similar to high g b-Beam
The Medium flux between low and high g b-Beam
The Nominal flux similar to Super-Beams

16. Sensitivity to the mass hierarchy
ISS Physics Working Group arXiv:  
2000km km
LENF
BLiBB 3s
Nominal, Medium and Ultimate fluxes
All the fluxes worse than the optimum NF
but better than the other facilities

17. Changing the detector mass
CP discovery potential
Sensitivity to the mass hierarchy 3s
50 Kt near and 50 Kt far vs 80 Kt near and 20 Kt far

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

19. 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, d and the mass hierarchy down to sin2 2q13  3·10-4
Impact of the background and the systematic errors very small. Performance limited by statistics
Sensitivity to CP violation can be improved adding mass to near detector or using He/Ne for the short baseline (see also S. K. Agarwalla et al. arXiv: )

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

21. Event Rates
For 5yr exposure of each beam to a 50kt iron detector
sin2 2q13 = 0.01 d
Sign(Dm223)
n 2000km
n 7000km 90 +
595 20
155 2
-90
206
103
170 1 -
235 95 3 67 47
274 6 62