Analytic Model of a Regge Trajectory in the Space-like and Time-like Regions
Abstract
A model for a Regge trajectory compatible with the threshold behavior required by unitarity and asymptotics in agreement with Mandelstam analyticity is analyzed and confronted with the experimental data on the spectrum of the trajectory as well as those on the π- p π0 n charge-exchange reaction. The fitted trajectory deviates considerably from a linear one both in the space-like and time-like regions, matching nicely between the two.
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