The production ofJ/ψ in 200 GeV/A oxygen-uranium interactions

M.c Abreu ,I Linck,X Felgeyrolles,J Britz,J Fargeix,A Devaux,A Baldit,A Romana,S Ramos,P Gomez,P Force,L Kluberg,D Contardo,M Bedjidian,J Castor,M Pimenta,C Lourenço,P Gorodetzky,M Alimi,J Varela,P Bordalo,C Baglin,B Chaurand,L Peralta,S Borenstein,R Cases,R Haroutunian,C Racca,P Busson,E Descroix,C Charlot,R Salmeron,L Kraus,A Sinquin,G Landaud,C Gerschel,A Guichard,A Maio,J.‐Y Grossiord ,Augusto Casaca ,A Bussière ,J Gago ,Ruth Sonderegger ,G Barreira ,J.p Guillaud ,J.r Pizzi

doi:10.1007/bf01574524

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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