Centrality Dependences of Characteristics of Negative Pions in π− +12C Interactions at 40 GeV/c

  • Kh. K. Olimov Inha University in Tashkent (IUT), Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences
  • K. Olimov Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences
  • Sh. D. Tojimamatov Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences, National University of Uzbekistan
  • A. K. Olimov Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences
  • E. Kh. Bozorov National University of Uzbekistan, Institute of Nuclear Physics of the Uzbek Academy of Sciences
  • S. L. Lutpullaev Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences
  • Sh. Z. Kanokova Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences, National University of Uzbekistan
  • M. Aliev Tashkent State Agrarian University
  • M. Fazilov Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences
  • B. S. Yuldashev Institute of Nuclear Physics of the Uzbek Academy of Sciences
Keywords: pion production, collision centrality, relativistic nuclear collisions

Abstract

The collision centrality dependences of the mean multiplicities and kinematical characteristics of negative pions produced in п−+12C collisions at 40 GeV/с are investigated. It is obtained that the average values of the partial inelasticity coefficients of negative pions (without “leading” pions) do not depend on the п−+12C collision centrality. It is shown that the normalized transverse momentum distributions, as well as the average values of the transverse momentum of negative pions, do not depend within the uncertainties on the п−+12C collision centrality. The average value of the emission angle of the negative pions was found to increase with the п−+12C collision centrality. The comparison of the normalized emission angle distributions of the negative pions in the peripheral and central п−+12C collisions at 40 GeV/с supported the assumption that such an increase in the average emission angle is likely due to an increase in the number of binary collisions and multiple rescatterings with the п−+12C collision centrality. The obtained experimental findings are reproduced qualitatively well by the Modified FRITIOF model calculations.

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Published
2019-02-21
How to Cite
Olimov, K., Olimov, K., Tojimamatov, S., Olimov, A., Bozorov, E., Lutpullaev, S., Kanokova, S., Aliev, M., Fazilov, M., & Yuldashev, B. (2019). Centrality Dependences of Characteristics of Negative Pions in π− +12C Interactions at 40 GeV/c. Ukrainian Journal of Physics, 64(2), 93. https://doi.org/10.15407/ujpe64.2.93
Section
Fields and elementary particles