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Intermediate mass dimuon production in indium-indium collisions at the CERN SPS

Abstract : We present preliminary results on the production of intermediate mass dimuons in 158 A-GeV In-In collisions at the CERN SPS. NA38 and NA50 observed a strong excess in this region in S-U and Pb-Pb interactions with respect to the dimuon production rate expected from p-A data. Thanks to the use of a pixel vertex tracker, NA60 can separate the prompt dimuons from the pairs resulting from open charm decays and show that the excess dimuons are of prompt origin.
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http://hal.in2p3.fr/in2p3-00025243
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R. Shaoyan, R. Arnaldi, R. Averbeck, K. Banicz, J. Castor, et al.. Intermediate mass dimuon production in indium-indium collisions at the CERN SPS. International Europhysics Conference on High Energy Physics HEP2005, Jul 2005, Lisboa, Portugal. pp.PoS(HEP2005)131. ⟨in2p3-00025243⟩

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