On dips, structures and eikonalization |
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Authors: | P Desgrolard M Giffon E Martynov E Predazzi |
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Institution: | (1) Institut de Physique Nucléaire de Lyon, IN2P3-CNRS et Université Claude Bernard, 43 boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France , FR;(2) Bogoliubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Metrologicheskaja 14b, 03143, Kiev-143, Ukraine , UA;(3) Dipartimento di Fisica Teorica, Università di Torino and Sezione INFN di Torino, Italy , IT |
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Abstract: | We have investigated several models of Pomeron and Odderon contributions to high energy elastic pp and scattering. The questions we address concern their role in this field, the behavior of the scattering amplitude (or of the
total cross-section) at high energy, and how to fit all high energy elastic data. The data are quite well reproduced by our
approach at all momenta and for sufficiently high energies. The relative virtues of Born amplitudes and of different kinds
of eikonalizations are considered. An important point in this respect is that secondary structures are predicted in the differential
cross-sections at increasing energies and these phenomena appear to be quite directly related to the procedure of eikonalizing
the various Born amplitudes. We conclude that these secondary structures arise naturally within the eikonalized procedure
(although their precise localization turns out to be model dependent). The fitting procedure naturally predicts the appearance
of a zero at small in the real part of the even amplitude as anticipated by general theorems. We would like to stress, once again, how important
it would be to have at LHC both pp and options for many questions connected to the general properties of high energy hadronic physics and for a check of our predictions.
Received: 20 January 2000 / Revised version: 28 February 2000 / Published online: 6 July 2000 |
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