Problems of determination of \sigma_{tot} at the LHC

Abstract

The analysis of the procedure of the determining the parameters of the hadron elastic scattering amplitude at high energy is presented. The exponential and non-exponential form of the scattering amplitude are taken into account. Especially, the impact of the real parts of the hadron scattering amplitude and electromagnetic hadron interaction on the determination of the total cross section is examined.

Comments: minor corrections; 3 pages, 2 figures; Presented at EDS Blois 2013 (arXiv:1309.5705)