Centrality dependence of pion and proton spectra in C+C and C+Ta interactions at 4.2 GeV/{ital c} per nucleon
- Institute of Physics, Belgrade (Yugoslavia)
- Faculty of Natural Sciences and Mathematics, University of Montenegro, Podgorica (Yugoslavia)
- Joint Institute of Nuclear Research, Dubna (Russian Federation)
Target and centrality dependence of pion and proton distributions is studied in C+C and C+Ta collisions at 4.2 GeV/{ital c} per nucleon using the 2-m propane bubble chamber. The experimental data are compared with the predictions of the Monte Carlo quark-gluon string model (QGSM). The pion and proton transverse momentum spectra at midrapidity are well described by the two-component thermal model. The shape of the proton rapidity distribution strongly depends on the collision centrality and reflects the stopping power of colliding nuclei. The pion rapidity distribution is Gaussian in shape regardless of the target mass number and collision centrality. The QGSM completely reproduces main features of pion and proton rapidity spectra as well as pion transverse momentum spectra. The model does not fully reproduce the features of the proton transverse momentum spectra.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 69536
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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