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Shahoyan, R.; Arnaldi, R.; Averbeck, R.; Banicz, K.; Castor, J.; Chaurand, B.; Cicalò, C.; Colla, A.; Cortese, P.; 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.; Lourenço, C.; Lozano, J.; 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.; Sonderegger, P.; Specht, H.J.; Tieulent, R.; Usai, G.; Veenhof, R.; Wöhri, H.K.
Nuclear Physics A, 2006, Letnik: 774Journal Article, Conference Proceeding
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 telescope, NA60 can separate the prompt dimuons from the pairs resulting from open charm decays and show that the excess dimuons are of prompt origin.
