2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 18, 359-367
DOI 10.1007/s100520000537

Elastic pp and $\bar pp$ scattering
in the modified additive quark model

P. Desgrolard1 - M. Giffon2 - 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 Bogoliubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, 03143, Kiev-143, Metrologicheskaja 14b, Ukraine

Received: 26 April 2000 / Revised version: 21 September 2000 /
Published online: 8 December 2000 - © Springer-Verlag 2000

Abstract
The modified additive quark model, proposed recently, allows one to improve the agreement of the standard additive quark model with the data on the $pp, \bar pp, \pi^{\pm} p, \gamma p$ and $\gamma \gamma$ total cross-sections, as well as on the ratios of real to imaginary part of the pp and $\bar pp$ amplitudes at t=0. Here, we extend this model to non-forward elastic scattering of protons and antiprotons. A high quality reproduction of the angular distributions at 19.4GeV $\leq s^{1/2}\leq 1800$GeV is obtained. A zero at small |t| in the real part of the even amplitude in accordance with a recently proved general high energy theorem is found.


Copyright Società Italiana di Fisica, Springer-Verlag 2000