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J/psi, psi' and Drell-Yan production in S U interactions at 200-GeV per nucleon.

The NA38 collaboration Abreu, M.C. ; Astruc, J. ; Baglin, C. ; et al.

Phys.Lett.B 449 (1999) 128-136, 1999.

Inspire Record 482405 DOI 10.17182/hepdata.49239

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.

2 data tables

Table 1

Cross sections (times decay BR into di-muons) and ratios.

Table 2

Centrality dependence of the rations of J/PSI/DY and PSI(3685)/J/PSI production.

Transverse momentum of J/psi, psi' and mass continuum muon pairs produced in S-32 U collisions at 200-GeV/c per nucleon.

The NA38 collaboration Abreu, M.C ; Astruc, J ; Baglin, C ; et al.

Phys.Lett.B 423 (1998) 207-212, 1998.

Inspire Record 467276 DOI 10.17182/hepdata.40524

We have studied the production of J/ ψ , ψ ′ and prompt muon pairs in the mass continuum from a sample of sulfur-uranium interactions at 200 GeV/c per nucleon. We report, in this letter, results obtained for the transverse momentum distributions and their dependence on the transverse energy released in the collision, used as an estimator of the centrality of the nucleus-nucleus interaction.

11 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Phi, rho, and omega production in p U, O U and S U reactions at 200-GeV per nucleon

The NA38 collaboration Baglin, C. ; Baldisseri, A. ; Bussiere, A. ; et al.

Phys.Lett.B 272 (1991) 449-454, 1991.

Inspire Record 325656 DOI 10.17182/hepdata.29289

Low mass muon pair production at high P T and low X F studied in pU, OU and SU 200 GeV per nucleon react ions. When energy density or projectile mass are increased, φ production is enhanced as compared with the yield of muon pairs in the mass continuum (1.7< M μμ < 2.4 GeV/ c 2 ), whereas the production of ω and ϱ, experimentally unresolved, remains approximately constant. This φ enhancement is in agreement with predictions based on quark-gluon plasma formation and, together with the previously reported J/Ψ suppression, puts severe constraints on a purely hadronic description of nucleus-nucleus collisions.

1 data table

Table 1

The cross sections are parametrized as A**POWER.

J / psi, psi-prime and muon pair production in p - W and S - U collisions

The NA38 collaboration Abreu, M.C. ; Baglin, C. ; Baldit, A. ; et al.

Nucl.Phys.A 566 (1994) 77C-85C, 1994.

Inspire Record 358346 DOI 10.17182/hepdata.36538

In this paper we present a study on the production of the J ψ and ψ′ resonances, decaying into muon pairs, in S-U collisions, at 200 GeV per incident nucleon. We find that the ratio between ψ′ and tJ ψ yields decreases as E T , the neutral transverse energy produced in the collision, increases. There is also a clear decrease of this ratio when going from p-W to S-U interactions. Assuming the high mass continuum to be Drell-Yan we discuss the possible understanding of the intermediate dimuon mass region as a superposition of Drell-Yan (extrapolated down in mass) and muon pairs from the semileptonic decays of charmed mesons. The p-W data is found to be explained by this procedure. However, the S-U data seems to be incompatible with a linear extrapolation from the proton-nucleus results.

4 data tables

Table 1

THE NEUTRAL TRANSVERSE ENERGY PRODUCED IN THE COLLISION > 15 GEV.

Table 2

THE NEUTRAL TRANSVERSE ENERGY PRODUCED IN THE COLLISION > 15 GEV.

Table 3

THE NEUTRAL TRANSVERSE ENERGY PRODUCED IN THE COLLISION > 15 GEV.

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