Eur. Phys. J. C (2004) 37: 241-249
https://doi.org/10.1140/epjc/s2004-01985-y

theoretical physics

Eikonal amplitude in the gravireggeon model at superplanckian energies

Institute for High Energy Physics, 142281, Protvino, Russia

^* e-mail: alexandre.kisselev@mail.ihep.ru

Abstract

The gravity effects in high-energy scattering, described by a four-dimensional eikonal amplitude related to gravireggeons induced by compact extra dimensions are studied. It is demonstrated that the real part of the eikonal (with a massless mode subtracted) dominates its imaginary part at both small and large impact parameters, in contrast with the usual case of hadronic high-energy behavior. The real part of the scattering amplitude exhibits an exponential falloff at large momentum transfer, similar to that of the imaginary part of the amplitude.