Toyota National College of Technology

1
GLoBES 2007
Measuring the Leptonic CP Phase in
Oscillations
1/24-1/26 at Heidelberg

• Toyota National College of Technology
• A.Takamura
• Collaboration with
• K.Kimura and T.Yoshikawa

2
Outline of this talk
Recent MINOS results and deviation from maximal
mixing
Three flavor effect in disappearance channel
Energy and baseline length with large CP phase
effect
GLoBES
As a main result, degeneracy on CP phase can be
solved
3
Recent MINOS results
NuMI beam
Atmospheric neutrino
4
Discovery potential of 1-3 mixing angle
T2K experiment
Double-Chooz experiment
5
Deviation from maximal 2-3 mixing angle
Small parameter
Correction by deviation
6
Next explanation
Recent MINOS results and deviation from maximal
mixing
Three flavor effect in disappearance channel
Energy and baseline length with large CP phase
effect
GLoBES
As a main result, degeneracy on CP phase can be
solved
7
Three flavor effect such as CP violation
Two small parameters
Three kinds of corrections
8
CP violation in superbeam experiment
Magnitude of each coefficient
General feature on CP dependence
Unitarity relations
9
Estimation of Energy that CP violation is large
Effective masses
Resonance energies
Energy with large CP violation
10
Next explanation
Recent MINOS results and deviation from maximal
mixing
Three flavor effect in disappearance channel
Energy and baseline length with large CP phase
effect
GLoBES
As a main result, degeneracy on CP phase can be
solved
11
Tool to study magnitude of CP violation
Indices as a function
No fake CP violation
12
Search of regions with large indices
Parameter set
13
CP phase effect caused by CP even term
Change of probability
CP even term
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Main result
Recent MINOS results and deviation from maximal
mixing
Three flavor effect in disappearance channel
Energy and baseline length with large CP phase
effect
GLoBES
As a main result, degeneracy on CP phase can be
solved
15
GLoBES software as a useful tool
GLoBES software http//users.physik.tu-muenchen.de
/globes/
16
Usefulness of disappearance channel
Electron only
Muon only
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1-3 mixing dependence on CP phase
Electron and Muon
Electron only
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Summary
Large CP violation