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J/$\psi$ and $\phi$ production from proton to Pb induced reactions at CERN SPS
A new set of results obtained by the NA50 experiment for the $J/\psi$ production at the CERN SPS is presented. Peripheral Pb-Pb collisions benefit from an improved setup, confirming the departure from ordinary production observed for the most central collisions, which has suggested the occurrence of...
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Lenguaje: | eng |
Publicado: |
2003
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/S0375-9474(03)01043-1 http://cds.cern.ch/record/809050 |
Sumario: | A new set of results obtained by the NA50 experiment for the $J/\psi$ production at the CERN SPS is presented. Peripheral Pb-Pb collisions benefit from an improved setup, confirming the departure from ordinary production observed for the most central collisions, which has suggested the occurrence of a quark-gluon plasma formation. Improved comparative analyses of older data confirms the phi meson yield increase with centrality and between systems. The interest of the ratio phi / omega as a direct measurement of the strangeness increase is underlined. (19 refs). |
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