Speaker
Michal Praszalowicz
(Jagiellonian University, Krakow)
Description
In this talk we argue that geometric scaling conjectured and observed at
the ISR more than 50 years ago, still holds at the LHC. We discuss
regularities of the dip-bump structures of the differential elastic cross sections, emphasizing the fact that the ratio of bump to dip positions
is constant from the ISR to the LHC. Applying crossing and analyticity we
identify imaginary and real parts of the scattering amplitude and compute the $\rho$ parameter and the ratio of bump to dip values of the differential $pp$ cross section. We also discuss the energy dependence of the total elastic cross section and the violation of geometrical scaling outside the dip-bump region at the LHC.
Author
Michal Praszalowicz
(Jagiellonian University, Krakow)