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The production ofJ/ψ in 200 GeV/A oxygen-uranium interactions |
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| Authors: | M C Abreu M Alimi C Baglin A Baldit G P Barreira M Bedjidian P Bordalo S Borenstein J Britz A Bussiere P Busson A Casaca R Cases J Castor C Charlot B Chaurand D Contardo E Descroix A Devaux J Fargeix X Felgeyrolles P Force J M Gago C Gerschel P Gomez P Gorodetzky J Y Grossiord A Guichard J P Guillaud R Haroutunian L Kluberg L Kraus G Landaud I Linck C Louren?o A Maio L Peralta M Pimenta J R Pizzi C Racca S Ramos A Romana R Salmeron A Sinquin R Sonderegger J Varela WA Collaboration |
| Institution: | 1. LIP, P-1699, Lisbon, Portugal 2. IPNL, Univesité de Lyon and CNRS-IN 2P3, F-69622, Villeurbanne, France 3. LAPP, CNRS-IN2P3, F-74019, Annecy-le-Vieux, France 4. LPC, Université de Clermont-Ferrand and CNRS-IN2P3, F-63170, Aubière, France 5. LPNHE, Ecole Polytechnique and CNRS-IN2P3, F-91128, Palaiseau, France 6. CRN, CNRS-IN2P3 and Université Louis Pasteur, F-67037, Strasbourg, France 7. IFIC, E-46100, Burjasot, Valencia, Spain 8. IPN, Univesité de Paris-Sud and CNRS-IN2P3, F-91406, Orsay, France 9. CERN, CH-1211, Geneva 23, Switzerland |
| Abstract: | The dimuon production in 200 GeV/nucleon oxygen-uranium interactions is studied by the NA 38 Collaboration. The production ofJ/ψ, correlated with the transverse energyET, is investigated and compared to the continuum, as a function of the dimuon massM and transverse momentumPT. A value of 0.64±0.06 is found for the ratio (ψ/Continuum at highET)/(ψ/Continuum at lowET), from which theJ/ψ relative suppression can be extracted. This suppression is enhanced at lowPT. |
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