Pion and proton "temperatures" in relativistic heavy-ion reactions
Pion and proton production are measured to investigate thermal equilibrium in central collisions of 40Ar+KCl at 1.8 GeV/nucleon. The bulk of the pion yield is isotropic in the c.m. system, with an apparent temperature of 58±3 MeV, much lower than the 118±2 MeV of the protons. It is shown that the low pion "temperature" can be explained by the decay kinematics of delta resonances in thermal equilibrium. A (5±1)% component in the pion spectrum is, however, found to have a temperature of 110±10 MeV. The effect on the spectra of possible contributions from collective radial flow is discussed.
| Author: | R. Brockmann, J. W. Harris, A. Sandoval, Reinhard Stock, Herbert Ströbele, G. Odyniec, H. G. Pugh, L. S. Schroeder, R. E. Renfordt, D. Schall, K. Bangert, W. Rauch, K. L. Wolf |
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| URN: | urn:nbn:de:hebis:30-17500 |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 05.10.2005 |
| Year of first Publication: | 1984 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Source: | Phys. Rev. Lett. 53, 2012-2015, ©1983 The American Physical Society, http://link.aps.org/abstract/PRL/v53/p2012 |
| HeBIS PPN: | 186959982 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
