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Properties of high-energy pions emitted from heavy-ion collisions at 1 GeV/nucleon |
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| Authors: | C Müntz P Baltes H Oeschler A Sartorius A Wagner W Ahner R Barth M Cie?lak M Debowski E Grosse W Henning P Koczoń D Mi?kowiec R Schicker P Senger C Bormann D Brill Y Shin J Stein R Stock H Ströbele B Kohlmeyer H Pöppl F Pühlhofer J Speer K Völkel W Walu? |
| Institution: | 1. Technische Hochschule Darmstadt, D-64289, Darmstadt, Germany 2. Gesellschaft für Schwerionenforschung, D-64220, Darmstadt, Germany 5. Johann Wolfgang Goethe-Universit?t, D-60325, Frankfurt/Main, Germany 6. Philipps Universit?t, D-35037, Marburg, Germany 7. Jagiellonian University, PL-30-059, Kraków, Poland |
| Abstract: | Positively charged pions and protons from collisions of Ne+NaF and Au+Au at 1 GeV/nucleon incident energy were measured near midrapidity. The center-of-mass pion spectra deviate from a Maxwell-Boltzmann distribution. The slope of the high-energy part of the pion spectra varies significantly with the system mass and little with the size of the reaction zone. While the total pion yield rises linearly with the number of participant nucleons, the highenergy component increases more than linearly. |
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