The NA61/SHINE collaboration has recently published high precision data on
production of ΟΒ± and KΒ± mesons, protons, antiprotons and Ξ
hyperons in pp interactions at 20, 31, 40, 80 and 158 GeV/c, and in
pC interactions at 31 GeV/c. The collaboration also presented
experimental data on production of particles - ΟΒ±, KΒ±, pΒ±,
Ο0, Ο and Kβ0 in ΟβC collisions at 158 and 350
GeV/c. The collaboration has compared these data with various Monte Carlo model
calculations: UrQMD, EPOS, GiBUU, and others.
All of the models have various problems. The latest version of the FTF
(Fritiof) model of Geant4 solves most of these problems. In the FTF model, we
have improved the fragmentation of quark-gluon strings with small masses and
introduced dependencies of probabilities of strange mesons and
baryon-antibaryon pair's creation on string masses. Due to these changes, we
describe the data of the NA61/SHINE collaboration on particle production in
pp,pC, and ΟβC interactions.
The improved Geant4 FTF model also well reproduces experimental data on
inclusive cross sections of Ξ,ΞΛ and K0 production in
antiproton-proton interactions at various energies. The modified FTF model
allows one to simulate realistic processes with two particle productions -
pΛβpβΞΞΛ, pΛβpβK+Kβ, pΛβpβΞΞ£Λ, and pΛβpβΣΣΛ, which will be studied in the future by the
PANDA experiment at FAIR (GSI, Germany).Comment: 10 pages, 8 figures, IWNT-37, Rila, 2018, Bulgari