Transverse flow in heavy ion interactions at the CERN SPS

Citation
P. Saturnini et al., Transverse flow in heavy ion interactions at the CERN SPS, NUCL PH B-P, 92, 2001, pp. 55-61
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
ISSN journal
0920-5632 → ACNP
Volume
92
Year of publication
2001
Pages
55 - 61
Database
ISI
SICI code
0920-5632(200102)92:<55:TFIHII>2.0.ZU;2-N
Abstract
In the search for the quark-gluon plasma at CERN SPS, several signals were observed suggesting that this new state of matter was actually produced in the interactions induced by the lead beam at 158A GeV. The transverse flow phenomena characterize the distribution of the particles in the final state of the collision, and are expected to provide some indications about the i nitial state. More precisely the existence of an elliptic flow directed alo ng the reaction plane in the case of the non central collisions of two sphe rical nuclei, has been proposed to probe the thermalisation of the initial state. Indeed. the NA50 collaboration has measured these kind of effects in Pb-Pb collisions at 158A GeV, and we can conclude that the thermalisation of the initial state is actually present in these interactions. Conversely. there is no evidence for such a thermalisation in the NA38 data which were obtained with the sulphur beam at 200A GeV, neither in S-S nor in S-Cu int eractions.