Low mass dimuon production in indium-indium collisions at 158 A GeV
- Usai G
- Arnaldi R
- Averbeck R
- Banicz K
- Castor J
- Chaurand B
- Cicalo C
- Colla A
- Damjanovic S
- David A
- de Falco A
- Devaux A
- Drees A
- Ducroux L
- En'yo H
- Ferretti A
- Floris M
- Force P
- Guettet N
- Guichard A
- Gulkanian H
- Heuser J
- Keil M
- Kluberg L
- Lozano J
- Lourenco C
- Manso F
- Masoni A
- Martins P
- Neves A
- Ohnishi H
- Oppedisano C
- Parracho P
- Pillot P
- Puddu G
- Radermacher E
- Ramalhete P
- Rosinsky P
- Scomparin E
- Seixas J
- Serci S
- Shahoyan R
- Sonderegger P
- Specht HJ
- Tieulent R
- Veenhof R
- Wohri HK
- CORTESE, Pietro
Publication date
January 2005
DOI Publisher
Springer Science and Business Media LLCAbstract
The NA60 experiment studies open charm and prompt dimuon production in proton-nucleus and nucleus-nucleus collisions at the CERN SPS. During 2003 the experiment collected data in Indium-Indium collisions at 158 GeV per nucleon. Almost 240 million dimuon events were recorded. New results on J/psi. suppression, open-charm production and low mass dimuons should help clarify some interesting questions left open by previous experiments. After a brief detector description, this paper focuses on the analysis of the low mass dimuons. Preliminary results are presented on the phi/psi. production cross section ratios and on the phi transverse momentum distributions, both as a function of collision centrality
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