Speaker
Dr
Oleg Selyugin
(JINR)
Description
A new analysis of the differential cross sections of the elastic proton-proton and proton-antiproton scattering in a wide energy region from PL > 3 GeV up to sqrt(s) = 1800 GeV in the Coulomb-hadron interference region was carried out to search for the existence of special structures over the background exponential behavior of the diffraction peak.
On the basis of many statistical data one finds a new phenomenan - a new periodic structure in the differential cross sections at small momentum transfer. We analyzed this phenomena through two independent methods. One is the standard fitting method using the 2 minimization and adding a small additional periodic function (Sin, Cos, Bessell function ….). The second method is based on the choice of two independent statistical samples. This method does not depend on the form of the periodic structure and gives the true probability for the presence a new effect. The basic characteristic of the periodic structure (period, amplitude and starting phase) were determined from the coincidence of the results of both methods. It was shown that the size of the new effect is determined by the size of the small additional periodic part of the hadron elastic scattering amplitude and its interference with the Coulomb amplitude in the small momentum transfer region. The properties of the corresponding additional part of the hadron interaction potential are discussed.
Primary author
Dr
Oleg Selyugin
(JINR)
Co-author
Dr
Jean-Rene Cudell
(University of Liege)
