1202.2016 (I. M. Dremin et al.)

Elastic pp-scattering at \sqrt s=7 TeV with the genuine Orear regime and
the dip    [PDF]

I. M. Dremin, V. A. Nechitailo

The unitarity condition unambigously requires the Orear region to appear in
between the diffraction cone at low transferred momenta and hard parton
scattering regime at high transferred momenta in hadron elastic scattering. It
originates from rescattering of the diffraction cone processes. It is shown
that such region has been observed in the differential cross section of the
elastic pp-scattering at \sqrt s=7 TeV. The Orear region is described by
exponential decrease with the scattering angle and imposed on it damped
oscillations. They explain the steepening at the end of the diffraction cone as
well as the dip and the subsequent maximum observed in TOTEM data. The failure
of several models to describe the data in this region can be understood as
improper account of the unitarity condition. It is shown that the real part of
the amplitude can be as large as the imaginary part in this region. The overlap
function is calculated and shown to be small outside the diffraction peak. Its
negative sign there indicates the important role of phases in the amplitudes of
inelastic processes.

View original: http://arxiv.org/abs/1202.2016