I have some data and 2 models, e.g., 

$H_0: \xi \sim \mathcal N(\mu_0, \sigma_0) $ 

$H_1: \xi \sim \mathcal N(\mu_1 > \mu_0, \sigma_0)$, 

in other words, this is the similar to the situation with "unequal means, alternative=greater".

How can I calculate the odds ratio $L(H_0) / L(H_1)$? Numerical integration could help, but often this integral is divergent (upper limit is infinity).