Cause of Disparity between the Results for the n n ¯ Transition Problem
Abstract
We show that there is a double counting in the standard model of
n
n
¯
mixing in the medium, resulting in full cancellation of leading terms. The direct calculation of
n
n
¯
transition, annihilation is performed. For lower limit on the free-space
n
n
¯
oscillation time we get
τ
min
∼
10
31
y
.