Asymptotics of the contour of the stationary phase and efficient evaluation of the Mellin-Barnes integral for the F_3 structure function

A. V. Sidorov, V. I. Lashkevich, O. P. Solovtsova

A new approximation is proposed for the contour of the stationary phase of the Mellin--Barnes integrals in the case of its finite asymptotic behavior as $\mathrm{Re}z\to -\infty$. Th…