Investigation of the π-p→π0n reaction at large momentum transfers
Apel W.D. , Augenstein K.H., Bertolucci E. , Vincelli M.L., Donskov S.V. , Inyakin A.V., Kachanov V.A., Quaglia M. , Krasnokutskii R.N., Krueger M., Leder G., Mannelli I. , Mikhallov Yu.V., Prokoshkin Yu.D., Pierazzini G.M. , Sergiampietri F. , Sigurdsson G. , Scribano A. , Toropin A.N. , Schneider H. , Shuvalov R.S.
Data are presented on the charge-exchange π~ρ scattering at a momentum 40 GeV/с at large momentum transfers. The experiment was performed with the 70-GeV Serpukhov accelerator using a 648-channel hodoscopic γ spectrometer. The total statistics amounted to more than a million ir° mesons, making it possible to advance into the momentum-transfer region up to -f = 1.8 (GeV/c)2. The experimental data are compared with the optical model of the impact parameter. The imaginary part of the trajectory of the b(,(s) pole is determined from the slopes of the maxima of the function -y/-* άσ/dt. A linear increase of Imi>0(s) with log 5 is observed.