High-Energy Forward Scattering and the Pomeron: Simple Pole versus Unitarized Models

Details High-Energy Forward Scattering and the Pomeron: Simple Pole versus Unitarized Models High-Energy Forward Scattering and the Pomeron: Simple Pole versus Unitarized Models

1999-08-02

arxiv.org/abs/hep-ph/9908218v4

Phys.Rev. D61 (2000) 034019; Erratum-ibid. D63 (2001) 059901

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 10 figures. Predictions of Table 4 corrected and acknowledgements added

Scientific paper

10.1103/PhysRevD.61.034019

Using the largest data set available, we determine the best values that the data at t=0 (total cross sections and real parts of the hadronic amplitudes) give for the intercepts and couplings of the soft pomeron and of the rho/omega and a/f trajectories. We show that these data cannot discriminate between a simple-pole fit and asymptotic log square s and log s fits, and hence are not sufficient to reveal the ultimate nature of the pomeron. However, we evaluate the existing evidence (factorization, universality, quark counting) favouring the simple-pole hypothesis. We also examine the range of validity in energy of the fits, and show that one cannot rely on such fits in the region sqrt(s)<9 GeV. We also establish bounds on the odderon and the hard pomeron.

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