Eur. Phys. J. A 10, 217-221
Analytic model of Regge trajectoriesR. Fiore1, L.L. Jenkovszky2, V. Magas2, 3, F. Paccanoni4 and A. Papa1
1 Dipartimento di Fisica, Università della Calabria, INFN, Gruppo collegato di Cosenza, I-87036 Arcavacata di Rende (CS) Italy
2 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of the Ukraine, 03143 Kiev, Ukraine
3 Department of Physics, Bergen University, Allegaten 55, N-5007, Norway
4 Dipartimento di Fisica, Università di Padova, INFN, Sezione di Padova, via F. Marzolo 8, I-35131 Padova, Italy
(Received: 23 January 2001 Communicated by V.V. Anisovich)
A model for a Regge trajectory compatible with the threshold behavior required by unitarity and asymptotics in agreement with analyticity constraints is given in explicit form. The model is confronted in the time-like region with widths and masses of the mesonic resonances and, in the space-like region, the trajectory is compared with predictions derived from the -N charge-exchange reaction. Breaking of the exchange degeneracy is studied in the model and its effect on both the masses and widths is determined.
11.55.Jy - Regge formalism.
11.55.Bq - Analytic properties of S matrix.
14.40.-n - Mesons.
© Società Italiana di Fisica, Springer-Verlag 2001