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Latest results onJ/ψ anomalous suppression

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Abstract

The NA50 experiment deals with Pb-Pb collisions at 158 GeV/nucleon at the CERN SPS accelerator. TheJ/ψ production is studied through the muon decay channel, using the Drell-Yan dimuons as a reference. New results based on recent analyses, from data taken with improved experimental conditions and using different centrality estimators, are presented and compared to an update of those already obtained from previous data samples. The stepwise pattern of the anomalousJ/ψ suppression as a function of centrality, already present in these previous results, is confirmed. This observation could be a fingerprint of the theoretically predicted melting of charmonia resonances in a deconfined quark-gluon plasma.

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Authors and Affiliations

  1. Università del Piemonte Orientale, Alessandria and INFN-Torino, Italy

    P. Cortese, G. Dellacasa, F. Prino, L. Ramello, E. Scalas & M. Sitta

  2. LAPP, CNRS-IN2P3, Annecy-le-Vieux, France

    C. Baglin & A. Bussière

  3. LPC, Univ. Blaise Pascal and CNRS-IN2P3, Aubière, France

    A. Baldit, C. Castanier, J. Castor, A. Devaux, B. Espagnon, J. Fargeix, P. Force & P. Saturnini

  4. IFA, Bucharest, Romania

    C. Alexa, V. Boldea, S. Constantinescu & S. Dita

  5. Università di Cagliari/INFN, Cagliari, Italy

    C. Cicalo, A. DeFalco, P. Macciotta, A. Masoni, G. Puddu, S. Serci & G. L. Usai

  6. CERN, Geneva, Switzerland

    C. Lourenço & P. Sonderegger

  7. LIP, Lisbon, Portugal

    Sérgio Ramos, P. Bordalo, G. Borges, T. Claudino, J. Cruz, C. Quintans, S. Ramos, P. Rato Mendes, H. Santos & R. Shahoyan

  8. INR, Moscow, Russia

    Y. K. Gavrilov, M. B. Golubeva, F. F. Guber, T. L. Karavitcheva, A. B. Kurepin & N. S. Topilskaya

  9. IPN, Univ. de Paris-Sud and CNRS-IN2P3, Orsay, France

    M. P. Comets, C. Gerschel, D. Jouan, Y. Le Bornée, M. Mac Cormick, X. Tarrago, L. Villatte, N. Willis & T. Wu

  10. Laboratoire Leprince-Ringuet, Ecole Polytechnique and CNRS-IN2P3, Palaiseau, France

    S. R. Borenstein, B. Chaurand, O. Drapier, M. Gonin, L. Kluberg, P. Petiau & A. Romana

  11. Università di Torino/INFN, Torino, Italy

    B. Alessandro, R. Arnaldi, S. Beolè, E. Chiavassa, N. DeMarco, M. Gallio, P. Giubellino, M. Idzik, A. Marzari-Chiesa, M. Masera, M. Monteno, A. Musso, A. Piccotti, W. L. Prado da Silva, L. Riccati, E. Scomparin, F. Sigaudo & E. Vercellin

  12. IPN, Univ. Claude Bernard Lyon-I and CNRS-IN2P3, Villeurbanne, France

    M. Bedjidian, L. Capelli, B. Cheynis, J. Y. Grossiord, A. Guichard & J. R. Pizzi

  13. YerPhI, Yerevan, Armenia

    M. Atayan, A. A. Grigorian, S. Grigorian, H. Gulkanyan, R. Hakobyan & R. Haroutunian

  14. IST, Universidade Técnica de Lisboa, Lisbon, Portugal

    Sérgio Ramos, P. Bordalo, S. Ramos & P. Sonderegger

  15. CERN, Geneva, Switzerland

    P. Giubellino

  16. Fac. Physics and Nuclear Techniques, Univ. Mining and Metallurgy, Cracow, Poland

    M. Idzik

  17. UERJ, Rio de Janeiro, Brazil

    W. L. Prado da Silva

Authors
  1. Sérgio Ramos
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  2. B. Alessandro
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  3. C. Alexa
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  4. R. Arnaldi
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  5. M. Atayan
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  6. C. Baglin
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  7. A. Baldit
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  8. M. Bedjidian
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  9. S. Beolè
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  10. V. Boldea
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  11. P. Bordalo
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  12. S. R. Borenstein
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  13. G. Borges
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  14. A. Bussière
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  15. L. Capelli
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  16. C. Castanier
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  17. J. Castor
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  18. B. Chaurand
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  19. B. Cheynis
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  20. E. Chiavassa
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  21. C. Cicalo
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  22. T. Claudino
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  23. M. P. Comets
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  24. S. Constantinescu
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  25. P. Cortese
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  26. J. Cruz
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  27. A. DeFalco
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  28. N. DeMarco
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  29. G. Dellacasa
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  30. A. Devaux
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  31. S. Dita
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  32. O. Drapier
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  33. B. Espagnon
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  34. J. Fargeix
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  35. P. Force
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  36. M. Gallio
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  37. Y. K. Gavrilov
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  38. C. Gerschel
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  39. P. Giubellino
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  40. M. B. Golubeva
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  41. M. Gonin
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  42. A. A. Grigorian
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  43. S. Grigorian
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  44. J. Y. Grossiord
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  45. F. F. Guber
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  46. A. Guichard
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  47. H. Gulkanyan
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  48. R. Hakobyan
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  49. R. Haroutunian
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  50. M. Idzik
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  51. D. Jouan
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  52. T. L. Karavitcheva
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  53. L. Kluberg
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  54. A. B. Kurepin
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  55. Y. Le Bornée
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  56. C. Lourenço
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  57. P. Macciotta
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  58. M. Mac Cormick
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  59. A. Marzari-Chiesa
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  60. M. Masera
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  61. A. Masoni
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  62. M. Monteno
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  63. A. Musso
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  68. F. Prino
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  69. G. Puddu
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  70. C. Quintans
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  71. L. Ramello
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  72. S. Ramos
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  73. P. Rato Mendes
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  74. L. Riccati
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  75. A. Romana
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  76. H. Santos
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  77. P. Saturnini
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  78. E. Scalas
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  79. E. Scomparin
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  80. S. Serci
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  81. R. Shahoyan
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  82. F. Sigaudo
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  83. M. Sitta
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  84. P. Sonderegger
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  85. X. Tarrago
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  86. N. S. Topilskaya
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  87. G. L. Usai
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  88. E. Vercellin
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  89. L. Villatte
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  90. N. Willis
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  91. T. Wu
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NA50 Collaboration

Additional information

On leave of absence from York College, CUNY, New York USA

On leave of absence from YerPhI, Yerevan, Armenia

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Ramos, S., NA50 Collaboration., Alessandro, B. et al. Latest results onJ/ψ anomalous suppression. Pramana - J Phys 62, 627–630 (2004). https://doi.org/10.1007/BF02705332

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  • DOI: https://doi.org/10.1007/BF02705332

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