Geodesic
Difference of the total cross sections and the ratio of the differential cross sections of high energy $\pi^\pm p$ forward scattering
Teoretičeskaâ i matematičeskaâ fizika, Tome 13 (1972) no. 3, pp. 362-367 
V. Z. Baluni; Yu. S. Vernov; O. V. Dumbrais; M. N. Mnatsakanova. Difference of the total cross sections and the ratio of the differential cross sections of high energy $\pi^\pm p$ forward scattering. Teoretičeskaâ i matematičeskaâ fizika, Tome 13 (1972) no. 3, pp. 362-367. http://geodesic.mathdoc.fr/item/TMF_1972_13_3_a6/
@article{TMF_1972_13_3_a6,
     author = {V. Z. Baluni and Yu. S. Vernov and O. V. Dumbrais and M. N. Mnatsakanova},
     title = {Difference of the total cross sections and the ratio of the differential cross sections of high energy $\pi^\pm p$ forward scattering},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {362--367},
     year = {1972},
     volume = {13},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_13_3_a6/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

The general properties of the scattering amplitude and the experimental data on the total and the differential cross sections of $\pi^\pm p$ forward scattering yield \begin{gather*} \int^\infty_{30\mathrm{\,GeV}}\ln\biggl(\frac{d\sigma_+(E,0)}{dt}\bigg/\frac{d\sigma_-(E,0)}{dt}\biggr)\frac{dE}E=-0.112\pm0.025, \\ \int^\infty_{60\mathrm{\,GeV}}\frac{\sigma_+(E)-\sigma_-(E)}E\,dE=-0.103\pm0.016. \end{gather*}

[1] V. Z. Baluni, Yu. S. Vernov, TMF, 5 (1970), 235

[2] G. Höhler, R. Strauss, University of Karlsruhe preprint, October 1970

[3] O. V. Dumbrais, Preprint El-5897, JINR, 1971

[4] M. N. Mnatsakanova, TMF (to appear)

[5] J. V. Allabyet al., Phys. Lett., 30B (1969), 500 | DOI

[6] K. J. Foley et al., Phys. Rev., 181 (1969), 1775 | DOI