Estimater-correlator L(x)= 2 i!te p{o4可∑2oj} 2m2 ex{-∑2(mj月 whxiong@uestc.edu.cn 6whxiong@uestc.edu.cn Estimater-correlator 6 L(x) = 1 [2¼(¾2 s +¾2)] N=2 exp n ¡ 1 2(¾2 s +¾2) Px 2 (n) o 1 (2¼¾2) N=2 exp © ¡ 1 2¾2 Px 2(n) ª