Contributions of various mechanisms of pion production into kinematical spectra of negative pions in collisions of deuterons with 12C nuclei at incident momentum of 4.2 GeV/c per nucleon.

Autor: Olimov, Kosim, Gulamov, Kadyr G., Olimov, Khusniddin K., Suvanov, Akbar I., Olimov, Alisher K., Samatov, Gulam B.
Zdroj: European Physical Journal Plus; Sep2024, Vol. 139 Issue 9, p1-7, 7p
Abstrakt: The new experimental results on various kinematical characteristics of the negative pions, coming from decays of Δ0 and Δ− resonances, and produced due to direct production mechanism in pairs (π+π−) and inelastic charge exchange reaction (n → p + π−) of the neutrons of projectile and target nuclei, in d12C collisions at 4.2 GeV/c per nucleon have been presented. The fractions of the negative pions coming from each of the above mechanisms in d12C collisions at 4.2 GeV/c per nucleon have been estimated. The contributions to the negative pion production from inelastic charge exchange reaction of a target neutron, from inelastic charge exchange reaction of a projectile neutron, and from direct production mechanism in pairs (π+π−), have coincided within statistical uncertainties, being equal ≈ 13% for each of these three sources of π− production. The widths (Ϭ) and average values of all analyzed kinematical spectra (full momentum, transverse momentum, longitudinal rapidity, and emission angle distributions) of the negative pions, coming from decays of Δ0 and Δ− resonances, have proved to be significantly smaller as compared to those of π− mesons, coming from direct production mechanism and inelastic charge exchange reaction of the target and projectile neutrons in d12C collisions at 4.2 GeV/c per nucleon. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: