SOLLFRANK, J and KOCH, P and HEINZ, U (1991) IS THERE A LOW-PT ANOMALY IN THE PION MOMENTUM SPECTRA FROM RELATIVISTIC NUCLEAR COLLISIONS. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 52 (4). pp. 593-609. ISSN 0170-9739,
Full text not available from this repository.Abstract
The influence of resonance production in relativistic hadron-hadron and nucleus-nucleus collisions, and their role in explaining the so-called "anomalous" behaviour of the hadronic transverse momentum spectra at low p(T), is studied qualitatively and quantitatively in the framework of a simple thermodynamical model. In the discussion effects from the different kinematics in 2- and 3-body decays and from the finite width of the resonances are included. We compare our results with data from the NA35 collaboration for pion, kaon, proton and LAMBDA p(T)-spectra from 200 A GeV S + S collisions and with pp data at similar energies. The model can successfully describe both S + S and pp data, with T = 200 MeV, mu-b = 200 MeV and T = 180 MeV, mu-b = 250 MeV, respectively. We discuss the consistency of these parameters by comparing with measured particle ratios and checking the freeze-out conditions. We conclude that the low-p(T) part of the pion spectra is dominated by resonance decays, and that there is no low-p(T) "anomaly". We also find, that the flattening of the high-p(T) tail in central nuclear collisions compared to pp data is probably not of thermal origin but caused by other effects, e.g. collective transverse flow.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROTON-PROTON COLLISIONS; HEAVY-ION COLLISIONS; TRANSVERSE-MOMENTUM; PARTICLE-PRODUCTION; HOT MATTER; CERN; HADRONS; VECTOR; ENERGY; MODEL; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/55179 |
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