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A comparative measurement of ϕ→K+K− and ϕ→μ+μ− in In-In collisions at the CERN SPS

The NA60 experiment at the CERN SPS has studied ϕ meson production in In-In collisions at 158 A GeV via both the K+K− and the μ+μ− decay channels. The yields and inverse slope parameters of the mT spectra observed in the two channels are compatible within errors, different from the large discrepanci...

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Hauptverfasser: Arnaldi, Roberta (VerfasserIn) , Banicz, K. (VerfasserIn) , Castor, J. (VerfasserIn) , Chaurand, B. (VerfasserIn) , Chen, W. (VerfasserIn) , Cicalò, C. (VerfasserIn) , Colla, A. (VerfasserIn) , Cortese, P. (VerfasserIn) , Damjanovic, S. (VerfasserIn) , David, A. (VerfasserIn) , de Falco, A. (VerfasserIn) , Devaux, A. (VerfasserIn) , Ducroux, L. (VerfasserIn) , Enʼyo, H. (VerfasserIn) , Fargeix, J. (VerfasserIn) , Ferretti, A. (VerfasserIn) , Floris, M. (VerfasserIn) , Förster, A. (VerfasserIn) , Force, P. (VerfasserIn) , Guettet, N. (VerfasserIn) , Guichard, A. (VerfasserIn) , Gulkanian, H. (VerfasserIn) , Heuser, J. M. (VerfasserIn) , Keil, M. (VerfasserIn) , Li, Z. (VerfasserIn) , Lourenço, C. (VerfasserIn) , Lozano, J. (VerfasserIn) , Manso, F. (VerfasserIn) , Martins, P. (VerfasserIn) , Masoni, A. (VerfasserIn) , Neves, A. (VerfasserIn) , Ohnishi, H. (VerfasserIn) , Oppedisano, C. (VerfasserIn) , Parracho, P. (VerfasserIn) , Pillot, P. (VerfasserIn) , Poghosyan, T. (VerfasserIn) , Puddu, G. (VerfasserIn) , Radermacher, E. (VerfasserIn) , Ramalhete, P. (VerfasserIn) , Rosinsky, P. (VerfasserIn) , Scomparin, E. (VerfasserIn) , Seixas, J. (VerfasserIn) , Serci, S. (VerfasserIn) , Shahoyan, R. (VerfasserIn) , Sonderegger, P. (VerfasserIn) , Specht, Hans Joachim (VerfasserIn) , Tieulent, R. (VerfasserIn) , Uras, A. (VerfasserIn) , Usai, G. (VerfasserIn) , Veenhof, R. (VerfasserIn) , Wöhri, H. K. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 20 April 2011
In: Physics letters
Year: 2011, Jahrgang: 699, Heft: 5, Pages: 325-329
ISSN:1873-2445
DOI:10.1016/j.physletb.2011.04.028
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2011.04.028
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269311004278
Volltext
Verfasserangaben:R. Arnaldi, K. Banicz, J. Castor, B. Chaurand, W. Chen, C. Cicalò, A. Colla, P. Cortese, S. Damjanovic, A. David, A. de Falco, A. Devaux, L. Ducroux, H. Enʼyo, J. Fargeix, A. Ferretti, M. Floris, A. Förster, P. Force, N. Guettet, A. Guichard, H. Gulkanian, J.M. Heuser, M. Keil, Z. Li, C. Lourenço, J. Lozano, F. Manso, P. Martins, A. Masoni, A. Neves, H. Ohnishi, C. Oppedisano, P. Parracho, P. Pillot, T. Poghosyan, G. Puddu, E. Radermacher, P. Ramalhete, P. Rosinsky, E. Scomparin, J. Seixas, S. Serci, R. Shahoyan, P. Sonderegger, H.J. Specht, R. Tieulent, A. Uras, G. Usai, R. Veenhof, H.K. Wöhri

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520 |a The NA60 experiment at the CERN SPS has studied ϕ meson production in In-In collisions at 158 A GeV via both the K+K− and the μ+μ− decay channels. The yields and inverse slope parameters of the mT spectra observed in the two channels are compatible within errors, different from the large discrepancies seen in Pb-Pb collisions between the hadronic (NA49) and dimuon (NA50) decay channels. Possible physics implications are discussed. 
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