Regge analysis of pion-pion (and pion-kaon) scattering for energy s^(1/2)> 1.4 GeV



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Peláez Sagredo, José Ramón and Ynduráin, F. J. (2004) Regge analysis of pion-pion (and pion-kaon) scattering for energy s^(1/2)> 1.4 GeV. Physical review D, 69 (11). ISSN 0556-2821

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We perform a detailed Regge analysis of NN, πN, KN, π π, and πK scattering. From it, we find expressions that represent the pp scattering amplitudes with an accuracy of a few percent for exchange of isospin zero and ~15% for exchange of isospin 1, and this for energies s^(1/2) ˃1.4 GeV and for momentum transfers |t|^( ½) ≤0.4 GeV. These Regge formulas are perfectly compatible with the low energy [s^(1/2)~1.4 GeV] scattering amplitudes deduced from π π phase shift analyses as well as with higher energy [s^(1/2)≥1.4 GeV] experimental π π cross sections. They are also compatible with NN, KN, and πN experimental cross sections using factorization, a property that we check with precision. This contrasts with results from current phase shift analyses of the π π scattering amplitude, which bear little resemblance to reality in the region 1.4<s^(1/2)<2 GeV, as they are not well defined and increasingly violate a number of physical requirements when the energy grows. πK scattering is also considered, and we present a Regge analysis for these processes valid for energies s^(1/2) ˃1.7 GeV. As a by-product of our analysis we obtain also a fit of NN, πN, and KN cross sections valid from c.m. kinetic energy E_(kin)≈.1 GeV to multi-TeV energies.

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©2004 The American Physical Society.
We are grateful to CICYT, Spain, and to INTAS, for partial financial support. J.R.P. thanks partial support from the Spanish CICYT projects, Nos. BFM2000-1326 and BFM2002-01003, and the E.U. EURIDICE network contract No. HPRN-CT-2002-00311.

Uncontrolled Keywords:Phase-shift analysis; Inelastic Ep scattering; Angular-momentum plane; Cross sections; Quantum chromodynamics; Perturbation-theory; Gev-C; Trajectories; Collisions; Dynamics
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35501
Deposited On:04 Feb 2016 12:31
Last Modified:10 Dec 2018 15:09

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