Formation of Δ0-izobar in nC-collisions at 4.2 GeV/c

• Main Authors: Rahmatillo N. Bekmirzaev, Xursand U. Bekmirzaeva, Gulmurod U. Khudoyberdiev, Marjona I. Mustafayeva, Bahodir E. Nabiev
• Format: Article
• Language: English
• Published: Herzen State Pedagogical University of Russia 2020-09-01
• Series: Physics of Complex Systems
• Subjects: hadron and nucleus-nucleus collisions; Δ0-isobar; π−-mesons; effective proton masses; accelerator; propane chamber
• Online Access: https://physcomsys.ru/index.php/physcomsys/article/view/30

The study is dedicated to the multiplicity of momentum and angular characteristics of protons formed in nC-collisions at a pulse of 4.2 GeV/c. The experimental results on the formation of Δ0 isobars in nC-collisions at 4.2 GeV/c are presented for the first time. Experimental and normalised background distribution of the effective mass for protons and π−-mesons was obtained. This study is a follow-up to prior research. It explores various kinematic characteristics of π‒-mesons formed in nC-collisions at 4.2 GeV/c. The data obtained are compared with the experimental data obtained for pA interactions at the same energy. The experimental material used in this work was obtained using a 2-meter propane bubble chamber of the JINR LHE irradiated with beams of proton, deuteron and helium-4 nuclei at a pulse of 4.2 GeV/c per nucleon at the Dubna Synchrophasotron and consists of 6736 pC, 7071 dC and 11974 4HeC events. Negative π mesons are identified visually by the charge sign only.