Consider the following functional :
$$ I(x,s) =\int_0^\infty\mathrm dy \frac{F(x + \mathrm iy, s) − F(x −\mathrm iy, s)}{\mathrm e^{2πy}-1}, $$ where $ F(z, s) = \dfrac{\sin^2[π\Gamma(z)/(2z)]}{z^s} $.
Let us restrict $s\in[0,1]$
In Mathematica
f[z_, s_] = Sin[π Gamma[z]/(2z)]^2/z^s;
II[x_, s_] := Integrate[(f[x + I y, s] - f[x - I y, s])/(Exp[2 Pi y] - 1),
{y, 0,Infinity}]
Can we get sharp numerical asymptotic of $I(x)$ as as $x\rightarrow \infty$?
Also, can we get quantitative upper and lower bound estimations on the functional ?
Update : Also try for $$F(z)= \log(z){\sin^2[π\Gamma(z)/(2z)]}$$
Series[]
? $\endgroup$Integrate[]
$\endgroup$