June 22, 2005 June 22, 2005 Sergio Palomares-Ruiz Sergio Palomares-Ruiz Super-NO Super-NO A A Based on Based on O. Mena, SPR and S. Pascoli O. Mena, SPR and S. Pascoli hep-ph/0504015 hep-ph/0504015 a long-baseline neutrino a long-baseline neutrino experiment experiment with two off-axis detectors with two off-axis detectors
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Sergio Palomares-Ruiz June 22, 2005 Super-NO A Based on O. Mena, SPR and S. Pascoli hep-ph/0504015 a long-baseline neutrino experiment with two off-axis.
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June 22, 2005June 22, 2005
Sergio Palomares-Sergio Palomares-RuizRuiz
Super-NOSuper-NOAA
Based onBased on
O. Mena, SPR and S. PascoliO. Mena, SPR and S. Pascoli
hep-ph/0504015hep-ph/0504015
a long-baseline neutrino a long-baseline neutrino experimentexperiment
with two off-axis detectorswith two off-axis detectors
June 22, 2005June 22, 2005
Sergio Palomares-Sergio Palomares-RuizRuiz
What we know and what we do What we know and what we do not know about neutrinosnot know about neutrinos
We We don’t knowdon’t know if there are sterile neutrinos if there are sterile neutrinos
We We don’t knowdon’t know what the absolute mass of neutrinos is what the absolute mass of neutrinos is
We We don’t knowdon’t know what is their nature: Majorana or Dirac what is their nature: Majorana or Dirac
We We don’t knowdon’t know what is the mass mechanism what is the mass mechanism
We We knowknow that neutrinos do oscillate: have mass that neutrinos do oscillate: have mass
We We knowknow that there are only 3 light active neutrinos that there are only 3 light active neutrinos
June 22, 2005June 22, 2005
Sergio Palomares-Sergio Palomares-RuizRuiz
Solar sector
m221 = (7.6 - 8.6) 10-5
eV2
sin2 12 = (0.28 – 0.33)
Reactor sector
sin2 13 < 0.041
Atmospheric sector
| m231 | = (1.5 – 3.4) 10-3 eV2
sin2 223 > 0.92 We We don’t knowdon’t know the octant of the octant of 2323 We We don’t knowdon’t know whether there is CP violation in the lepton sector whether there is CP violation in the lepton sector We We don’t knowdon’t know the type of mass hierarchy the type of mass hierarchy We We don’t knowdon’t know whether whether 1313 is different from 0 is different from 0
We We knowknow
O. Mena and S. J. Parke, Phys. Rev. D69:117301, 2004
Comparison with NOComparison with NOA and A and T2KT2K pot/yr = 6.5 x 1020
pot/yr (PD) = 25 x 1020
12 km off-axis3 yrs + 3 yrs
6 yrs + 6 yrs with NOA
+3 yrs + 3 yrs
with 2nd detector at second maximum
With Super-NoAonly 5 yrs to getthere
D. S. Ayres et al. [NOA Collaboration], hep-ph/0503053
June 22, 2005June 22, 2005
Sergio Palomares-Sergio Palomares-RuizRuiz
ConclusionsConclusions Resolving degeneracies is a crucial taskResolving degeneracies is a crucial task
Super-NOSuper-NOAA: 2 off-axis (LAr) detectors with same : 2 off-axis (LAr) detectors with same L/E using the NuMI beam L/E using the NuMI beam →→ determination of determination of sign(sign( m m22
3131) free of degeneracies) free of degeneracies
Only need of 5 years of neutrino run to resolve the Only need of 5 years of neutrino run to resolve the type of hierarchy down to sintype of hierarchy down to sin22 2 21313 = 0.02 with = 0.02 with Proton Driver (for all values of Proton Driver (for all values of ))
Better capabilities than NOBetter capabilities than NOA + T2K at HK for A + T2K at HK for determining the type of mass hierarchydetermining the type of mass hierarchy