Slides 2 - Nanyang Technological University

• For neutrinos weak eigenstates may be different from mass
eigenstates.
• In a weak decay one produces a definite weak eigenstate
• Then at a later time t
Neutrino Oscillations
n n
cos
n
sin
n
e
m
1
n
sin
n
cos
iE1t
iE2t
n( t)
n e cos
n
e sin
E
1
P(
n
n
; t)
sin
2
e
E
e
1
f
m
f
2
2
m
2E
2
1
P(
n n
; L)
sin
2
2
2
2
sin
m
2E
2
2
2
[
sin
1
2
2
1
( E
2
2
E
1.
27m
E
1
2
2
) t]
L
e
e
n ( 0)
n
e
C ( t)
n C(
t)
n
f
17
f