Abstract.
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 \(\phi/\omega\) production cross section ratios and on the \(\phi\) transverse momentum distributions, both as a function of collision centrality.
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References
R. Arnaldi et al. (NA60 Coll.), Eur. Phys. J. C 43 (2005)
R. Shahoyan et al. (NA60 Coll.), Eur. Phys. J. C 43 (2005)
H.K. Wöhri et al. (NA60 Coll.), Eur. Phys. J. C 43 (2005)
G. Agakichiev et al. (CERES Coll.), Phys. Rev. Lett. 75, 1272 (1995); Phys. Lett. B 422, 405 (1998); B. Lenkeit et al. (CERES Coll.) Nucl. Phys. A 661, 23c (1999)
R. Rapp, J. Wambach, Adv. Nucl. Phys. 25, 1 (2000); G.E. Brown, M. Rho, Phys. Rep. 363, 85 (2002)
C. Lourenço, PhD thesis, IST, Lisbon, Portugal, 1995
M. Keil et al. , Nucl. Instrum. Meth. A 539, 137 (2005)
D. Jouan (NA50 Coll.), J. Phys. G 30, S277 (2004); B. Alessandro et al. (NA50 Coll.), Phys. Lett. B 555, 147 (2003)
V. Friese et al. (NA49 Coll.), Nucl. Phys. A 698, 487c (2002)
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Arrival of the final proofs: 1 July 2005
PACS:
25.75.Dw 25.75.Nq
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Usai, G., The NA60 Collaboration. Low mass dimuon production in Indium-Indium collisions at 158 A GeV. Eur. Phys. J. C 43, 415–420 (2005). https://doi.org/10.1140/epjc/s2005-02209-x
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DOI: https://doi.org/10.1140/epjc/s2005-02209-x