Study of multiplicity and the pseudorapidity correlation in the forward and backward hemisphere for pions and protons emitted in a ¹²C – emulsion interaction at 4.5 A ∙ GeV/c

Abstract

The paper presents an in depth study of the forward and backward pseudorapidity correlations for pions and protons produced in a 12C -emulsion interaction at 4.5 A . GeV/c. The angular distribution of protons and the pseudorapidity distribution of pions are pictured. The asymmetry parameter ( A ) and the forward -backward ratio ( F I B ) are shown as a function of the number of heavy particles (n,). L'article prCsente une Ctude en profondeur des corrilations de pseudorapiditC, vers l'avant et vers l'arrikre, pour les pions et les protons produits par interactionsi2C -Cmulsion a 4,s A . GeVlc. La distribution angulaire des protons et la distribution de pseudorapiditi des pions sont reprCsentCes. Le paramktre dlasymCtrie (A) et le rapport avant-arrikre (FIB) sont donnCs en fonction du nombre de particules lourdes (n,).[Traduit par la revue]Can. J. Phys. 67, 115 (1989)

Forward-backward multiplicity correlations of target fragments in nucleus-emulsion collisions at a few hundred MeV/u

“…The backward emission of protons and pions in hadron-nucleus [1][2][3][4][5][6][7] and nucleus-nucleus [8][9][10][11][12][13][14][15][16][17][18] at relativistic energies have been investigated exclusively. It is found that the backward proton production was attributed to the absorption of secondary pions by a nucleon pair in the target nucleus, and the backward pions production shown to be consistent with the cumulative effect [19].…”

“…The study of the production of backward particles in hadron-nucleus and nucleus-nucleus interactions at high energies has received considerable experimental and theoretical attention because the fact that the backward emission of relativistic particles in high energy hadronnucleon collisions is kinematically restricted. The backward emission of protons and pions in hadron-nucleus [1][2][3][4][5][6][7] and nucleus-nucleus [8][9][10][11][12][13][14][15][16][17][18] at relativistic energies have been investigated exclusively. It is found that the backward proton production was attributed to the absorption of secondary pions by a nucleon pair in the target nucleus, and the backward pions production shown to be consistent with the cumulative effect [19].…”