https://doi.org/10.1140/epjst/e2008-00773-0
Analytic properties of different unitarization schemes
1
JINR, Bogoliubov Laboratory of Theoretical Physics,
141980 Dubna, Moscow Region, Russia
2
AGO Dept., Université de Liège, Belgium
3
Torino University, Italy and INFN, Torino, Italy
Corresponding authors: selugin@theor.jinr.ru JR.Cudell@ulg.ac.be predazzi@to.infn.it
The analytic properties of the eikonal and U-matrix unitarization
schemes are examined. It is shown that the basic properties of
these schemes are identical. Both can fill the full circle of
unitarity, and both can lead to standard and non-standard
asymptotic relations for 
. The
relation between the phases of the unitarised amplitudes in each
scheme is examined, and it is shown that demanding equivalence of
the two schemes leads to a bound on the phase in the U-matrix
scheme.
© EDP Sciences, Springer-Verlag, 2008
