J/ψ, ψ′ and Drell-Yan production in S-U interactions at 200 GeV per nucleon

Abreu, M.C.; Astruc, J.; Baglin, C.; Baldit, A.; Bedjidian, M.; Bordalo, P.; Bohrani, A.; Bussiére, A.; Busson, P.; Castor, J.; Chambon, T.; Charlot, C.; Chaurand, B.; Chevrot, I.; Contardo, D.; Descroix, E.; Devaux, A.; Drapier, O.; Espagnon, B.; Fargeix, J.; Ferreira, R.; Fleuret, F.; Force, P.; Gago, J.; Gerschel, C.; Gorodetzky, P.; Grossiord, J. Y.; Guichard, A.; Guillaud, J.P.; Haroutunian, R.; Jouan, D.; Kluberg, L.; Kossakowski, R.; Landaud, G.; Lourenço, C.; Luquin, L.; Mandry, R.; Mourgues, S.; Malek, F.; Papillon, S.; Pizzi, J.R.; Racca, C.; Ramos, S.; Romana, A.; Ronceux, B.; Saturnini, P.; Silva, S.; Sonderegger, P.; Tarrago, X.; Varela, J.

doi:10.1016/s0370-2693(99)00057-x

Cited by 79 publications

(44 citation statements)

References 17 publications

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“…To do this directly, we would have to come back to the formula given by (9) and integrate it, instead of (12) , over p T . But this would involve a five-dimensional integral (the three-dimensional integral over q simplifies to the one-dimensional one, in fact) instead of the three-dimensional integral of (13). Therefore, we need to simplify in some way the direct method just mentioned above.…”

Section: J/ψ Absorption In Hadronic Mattermentioning

confidence: 99%

“…, we will put it instead of t f.o. as the upper limit of the integral over t in (13). Let us consider an A-B collision at impact parameter b.…”

Section: J/ψ Absorption In Hadronic Mattermentioning

confidence: 99%

“…[13,14] and references therein). Now, we shall focus on the dependence of the suppression on the initial energy density reached in the CRR.…”

Section: Introductionmentioning

confidence: 99%

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J/Ψsuppression in colliding nuclei: Statistical model analysis

Prorok

Turko

2001

Phys. Rev. C

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We consider the J/Ψ suppression at a high energy heavy ion collision. An ideal gas of massive hadrons in thermal and chemical equilibrium is formed in the central region. The finite-size gas expands longitudinally in accordance with Bjorken law. The transverse expansion in a form of the rarefaction wave is taken into account. We show that J/Ψ suppression in such an environment, when combined with the disintegration in nuclear matter, gives correct evaluation of NA38 and NA50 data in a broad range of initial energy densities.

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Section: J/ψ Absorption In Hadronic Mattermentioning

confidence: 99%

“…, we will put it instead of t f.o. as the upper limit of the integral over t in (13). Let us consider an A-B collision at impact parameter b.…”

Section: J/ψ Absorption In Hadronic Mattermentioning

confidence: 99%

See 1 more Smart Citation

J/Ψsuppression in colliding nuclei: Statistical model analysis

Prorok

Turko

2001

Phys. Rev. C

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“…This number can be translated into barn knowing the luminosity, which we have evaluated using the fitted number of J/ψ events and the previously measured J/ψ production cross sections in p-W collisions [30,31]. Finally, to compare the measured p-A values with the calculated pp values we have assumed a linear dependence of the open charm cross section on the target mass number, A.…”

Section: Determination Of σ CCmentioning

confidence: 99%

Dimuon and charm production in nucleus-nucleus collisions at the CERN-SPS

Abreu

2000

Eur. Phys. J. C

128

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Muon pair production in p-A, S-U and Pb-Pb collisions has been studied by the NA38 and NA50 collaborations at the CERN SPS. In this paper we present an analysis of the dimuon invariant mass region between the φ and the J/ψ. After subtraction of the combinatorial background due to π and K decays, we find that the superposition of dimuons from semi-leptonic decays of D mesons and from the Drell-Yan process reproduces well the mass and transverse momentum spectra measured in p-A collisions. From the yield of open charm dimuons required to fit our data we extract a charm production cross section in good agreement with previous measurements. A linear extrapolation of the p-A sources with the product of the mass numbers of the projectile and target nuclei, A×B, underestimates the yield measured in S-U and Pb-Pb collisions. The excess increases with the number of participant nucleons, and the ratio between the observed dimuon yield and the expected sources reaches a factor 2 for central Pb-Pb interactions. The kinematical distributions of the measured dimuon excess are compatible with those expected from the open charm contribution.

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“…However, the existing PHENIX muon spectrometer arms do not have sufficient mass resolution to separate the ψ(2s) peak from the much more prominent J/ψ peak in the dimuon continuum. [4,12,13]. A model which describes the fixed target data breaks down for the PHENIX data [11].…”

Section: New Capabilities At Forward Rapiditymentioning

confidence: 99%

The fate of the weakly-bound ψ(2s) in nuclear matter

Durham¹

2014

Nuclear Physics A

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We present new results of a completed PHENIX analysis of ψ(2s) modification at midrapidity in 200 GeV d+Au collisions. Strong suppression of the ψ(2s) relative to the J/ψ is observed. This difference in suppression is too strong to be explained by breakup effects in the nucleus, due to the short nuclear crossing times at RHIC. Given the observation of long range correlations in p(d)+A collisions at LHC and RHIC, consistent with hydrodynamics, these observations raise interesting questions about the mechanism of ψ(2s) suppression when it is produced in a nuclear target.In 2012, the PHENIX Collaboration installed the FVTX, a silicon tracker that precisely measures muon pair opening angles prior to any multiple scattering in the muon arm absorber, and thus provides an improved dimuon mass resolution. The FVTX allows the ψ(2s) to be separated from the J/ψ at forward and backward rapidity for the first time at RHIC. We present new results on ψ(2s) production in p + p collisions at √ s = 510 GeV from the 2013 data set.

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J/ψ, ψ′ and Drell-Yan production in S-U interactions at 200 GeV per nucleon

Abstract: A detailed study of J/ψ, ψ and Drell-Yan production in S-U collisions has been performed by experiment NA38 at the CERN SPS. This paper presents production cross sections and their centrality dependence, based on the largest sample of S-U events collected by the experiment.

Cited by 79 publications

References 17 publications

J/Ψsuppression in colliding nuclei: Statistical model analysis

J/Ψsuppression in colliding nuclei: Statistical model analysis

Dimuon and charm production in nucleus-nucleus collisions at the CERN-SPS

The fate of the weakly-bound ψ(2s) in nuclear matter

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