Where can I find the theory of abcissa of convergence for integrals necessary to understand ChenClass answer to
On the integral $I_s =\int_{1}^{\infty} (\pi(x)-Li(x))x^{-s-1} dx$
?
Note that the integral I is not a Dirichlet integral since Li is not a summatory function. In other words sI is not a Dirichlet series.