Abstract Elastic diffractive scattering of nucleons is described in terms Regge-eikonal approach. It demonstrated that, a wide kinematic region (starting from the U-70 energies), eikonal proton–proton can be approximated by sum two Reggeon exchange (namely, so-called soft Pomeron and f -Reggeon contributions). The range applicability considered approximation determined. predictive value propose...

Asymptotic behavior of the scattering amplitude for two scalar particles by scalar, vector and tensor exchanges at high energy and fixed momentum transfers is reconsidered in quantum field theory. In the framework of the quasi-potential approach and the modified perturbation theory a systematic scheme of finding the leading eikonal scattering amplitudes and its corrections are developed and con...

Various approaches to high energy forward scattering in quantum gravity are compared using the eikonal approximation. The massless limit of the eikonal is shown to be equivalent to other approximations for the same process, speci cally the semiclassical calculation due to G. 't Hooft and the topological eld theory due to H. and E. Verlinde. This comparison clari es these previous results, as it...

A bstract We identify an eikonal regime in celestial CFT 2 which massless 2-2 scattering is dominated by t-channel exchange. derive a formula for the amplitude that resums exchanges of arbitrary integer spin to all orders coupling. The resulting phase takes same form as flat space with powers center-of-mass energy replaced weight-shifting operators on sphere. independently compute two-point fun...

We compute dijet production in Deep Inelastic Scattering at low $x$ the dipole formalism next-to-eikonal accuracy. calculate contributions induced by single photon exchange of either longitudinal or transverse polarization. include all types corrections to eikonal approximation gluon background field: (i) finite width target, (ii) interaction quark-antiquark pair with subleading (transverse) co...