English

What do experimental data "say" about growth of hadronic total cross-section?

High Energy Physics - Phenomenology 2009-10-30 v1

Abstract

We reanalyse pˉp\bar p p and pppp high energy data of the elastic scattering above s=5\sqrt{s}=5 GeV on the total cross-section σtot\sigma_{tot} and on the forward ρ\rho-ratio for various models of Pomeron, utilizing two methods. The first one is based on analytic amplitudes, the other one relies on assumptions for σtot\sigma_{tot} and on dispersion relation for ρ\rho. We argue that it is not possible, from fitting only existing data for forward scattering, to select a definite asymptotic growth with the energy of σtot\sigma_{tot}. We find equivalent fits to the data together with a logarithmic Pomeron giving a behavior σtotlnγs\sigma_{tot} \propto \ln ^\gamma s, γ[0.5,2.20]\gamma\in [0.5,2.20] and with a supercritical Pomeron giving a behavior σtotsϵ\sigma_{tot} \propto s^\epsilon , ϵ[0.01,0.10]\epsilon\in [0.01,0.10].

Keywords

Cite

@article{arxiv.hep-ph/9706306,
  title  = {What do experimental data "say" about growth of hadronic total cross-section?},
  author = {P. Desgrolard and M. Giffon and E. S. Martynov},
  journal= {arXiv preprint arXiv:hep-ph/9706306},
  year   = {2009}
}

Comments

LaTeX, 18 pages, 5 eps figures included, to be published in Il Nuovo Cimento