Two-particle correlations of pions and light nuclear fragments in nucleus-nucleus interactions at an energy of 3.6 GeV/nucleon
- Kurchatov Institute, Moscow (Russian Federation); and others
ACorrelations between a charged particle emitted in the angular interval 10-32{degrees} (in the lab system) and a pion emitted in the angular interval 45-135{degrees} are measured for the interactions of {sup 12}C and {sup 4}He nuclei of energy 3.6 GeV/nucleon with various nuclear targets. In all cases, the correlated emission of such particles is discovered. As in the case of baryonic nuclear fragments, correlations are negative for light targets (a fragment and the first particle are emitted preferentially in opposite directions). However, in contrast to the case of baryonic fragments, the amplitudes of the correlations decrease with increasing mass of the target nucleus, and correlations even become positive in the case of a Pb target. The magnitudes of the correlations depend systematically on the characteristics of the entrance and exit channels. As in the case of baryonic nuclear fragments, these observations are consistent with the notion of collective motion in nuclear matter. In addition, the effect of pion rescattering with reflection in nuclear matter is observed. 6 refs., 3 figs.
- OSTI ID:
- 81644
- Journal Information:
- Physics of Atomic Nuclei, Vol. 57, Issue 11; Other Information: PBD: Nov 1994; TN: Translated from Yadernaya Fizika; 57: No. 11, 2057-2060(1994)
- Country of Publication:
- United States
- Language:
- English
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