Eur. Phys. J. C 22, 479-492 (2001)
Regge models of the proton structure function with and without hard pomeron: A comparative analysisP. Desgrolard1 and E. Martynov2
1 Institut de Physique Nucléaire de Lyon, IN2P3-CNRS et Université Claude Bernard, 43 boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France
2 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, 03143 Kiev-143, Metrologicheskaja 14b, Ukraine
(Received: 30 June 2001 / Revised version: 17 September 2001 / Published online: 23 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )
A comparative phenomenological analysis of Regge models with and without a hard pomeron component is performed using a common set of recently updated data. It is shown that the data at small x do not indicate explicitly the presence of the hard pomeron. Moreover, the models with two soft-pomeron components (simple and double poles in the angular momentum plane) with trajectories having intercept equal to one lead to the best description of the data not only at W>3 GeV and at small x but also at all and GeV 2.
© Società Italiana di Fisica, Springer-Verlag 2001