Significant issues related to elastic scattering at very high ensergies

Abstract

After giving a short review on the impact picture approach for the elastic scattering amplitude, we will discuss the importance of some issues related to its real and imaginary parts. This will be illustrated in the context of recent data from RHIC, Tevatron and LHC.

Comments: 9 pages, 4 figures, Invited talk presented at the 14th Workshop on Elastic and Diffractive Scattering (EDS Blois Workshop), December 15-21, 2011, Qui Nhon, Vietnam (to be published in the proceedings)