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Charmonium production and nuclear absorption in p A interactions at 450-GeV.

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.

Eur.Phys.J.C 33 (2004) 31-40, 2004.

Inspire Record 629957 DOI 10.17182/hepdata.30011

The production of ${\rm J}/\psi$ and

12 data tables match query

Table 1

The J/PSI production cross sections, per target nucleon, times the di-muon branching ratio for the two data samples.

Table 2

The PSI(3685) production cross sections, per target nucleon, times the di-muon branching ratio for the two data samples.

Table 3

J/PSI production cross section times the di-muon branching ratio for the BEtarget as a function of the Feynman X bin.

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psi' production in Pb-Pb collisions at 158 GeV/nucleon

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.

Eur.Phys.J.C 49 (2007) 559-567, 2007.

Inspire Record 733917 DOI 10.17182/hepdata.57420

psi' production is studied in Pb-Pb collisions at 158 GeV/c per nucleon incident momentum. Absolute cross-sections are measured and production rates are investigated as a function of the centrality of the collision. The results are compared with those obtained for lighter colliding systems and also for the J/psi meson produced under identical conditions.

7 data tables match query

Table 1

Inclusive cross sections for PSI(3685) and J/PSI, multiplied by their Branching ratios into MU+MU-,.

Table 2

Inclusive cross sections for Drell Yan in the 4.2-7 GeV/c** mass range.

Table 3

Inclusive cross sections for PSI(3685) and J/PSI, multiplied by theirBransching ratios into MU+MU-, and for Drell Yan in the 4.2-7 GeV/c** massrange.

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Bottomonium and Drell-Yan production in p-A collisions at 450 GeV

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.

Phys.Lett.B 635 (2006) 260-269, 2006.

Inspire Record 712992 DOI 10.17182/hepdata.57411

The NA50 Collaboration has measured heavy-quarkonium production in p-A collisions at 450 GeV incident energy (sqrt(s) = 29.1 GeV). We report here results on the production of the Upsilon states and of high-mass Drell-Yan muon pairs (m > 6 GeV). The cross-section at midrapidity and the A-dependence of the measured yields are determined and compared with the results of other fixed-target experiments and with the available theoretical estimates. Finally, we also address some issues concerning the transverse momentum distributions of the measured dimuons.

3 data tables match query

Table 1

Drell-Yann (for the mass region MMUMU>6GeV/c**2) and bottomonium cross sections, and their ratio.

Table 2

Mean pT and Mean PT**2 for Drell-Yann (4.5<MMUMU<8 GeV/c**2) Errors for Drell-Yann are purely statistical, error value for Upsilon includes a systematical error due to uncertianty in the extrapolation of the drell-yann yield into the upsilon region. The total error is anyway dominated by the statistical contribution.

Table 3

ALPHA parameter.

Charmonia and Drell-Yan production in proton-nucleus collisions at the CERN SPS

The NA50 collaboration Alessandro, B ; Alexa, C ; Arnaldi, R ; et al.

Phys.Lett.B 553 (2003) 167-178, 2003.

Inspire Record 612573 DOI 10.17182/hepdata.29487

Charmonium production in p – A collisions is a unique tool for the study of the interaction of bound c c states in nuclear matter. It can provide details on the basic features of the resonance formation mechanism and, in particular, on its non-perturbative aspects. In this Letter, we present an experimental study of charmonia and Drell–Yan production in proton–nucleus collisions at 450 GeV/ c . The results are analyzed in the framework of the Glauber model and lead to the values of the nuclear absorption cross-section σ abs pA for J / ψ and ψ ′. Then, we compare the J / ψ absorption in proton–nucleus and sulphur–uranium interactions, using NA38 data. We obtain that, for the J / ψ , σ abs pA and σ abs SU are compatible, showing that no sizeable additional suppression mechanism is present in S–U collisions, and confirming that the anomalous J / ψ suppression only sets in for Pb–Pb interactions.

4 data tables match query

Table 1

The J/PSI production cross section times the branching ratio to MU+ MU- pernucleon-nucleon collision for the differential nuclear targets.

Table 2

The PSI(3685) production cross section times the branching ratio to MU+ MU-per nucleon-nucleon collision for the differential nuclear targets.

Table 3

The Drell Yan cross section, divided by the mass number A, and multiplied by the isospin correction factors in the mass interval 2.9 to 4.5 GeV.

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J/psi and psi' production and their normal nuclear absorption in proton nucleus collisions at 400-GeV.

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.

Eur.Phys.J.C 48 (2006) 329, 2006.

Inspire Record 733916 DOI 10.17182/hepdata.57412

We report a new measurement of J/psi, psi' and Drell-Yan cross-sections, in the kinematical domain $-0.425<y_{\rm cm}<0.575$ and $-0.5<\cos\theta_{\rm CS}<0.5$, performed at the CERN-SPS using 400 GeV/c incident protons on Be, Al, Cu, Ag, W and Pb targets. The dependence of the charmonia production cross-sections on the size of the target nucleus allows to quantify the so-called normal nuclear absorption. In the framework of the Glauber model, this new measurement is combined with results previously obtained with the same apparatus, under different experimental conditions, and leads to a precise determination of the J/psi and psi' absorption cross-sections in the surrounding nuclear matter.

2 data tables match query

Table 1

Production cross sections, per taregt nucleon for J/PSI and PSI(3685) and for Drell-Yann dimuon in the mass range of 2.9-4.5 GeV/c**, integrated in the phase space windows of the measurement.

Table 2

Ratios of J/PSI, PSI(3685) and Drel Yann production cross sections, and for Drell-Yann dimuon in the mass range of 2.9-4.5 GeV/c**, integrated in the phase space windows of the measurement.

Evidence for deconfinement of quarks and gluons from the J/psi suppression pattern measured in Pb Pb collisions at the CERN-SPS.

The NA50 collaboration Abreu, M.C. ; Alessandro, B. ; Alexa, C. ; et al.

Phys.Lett.B 477 (2000) 28-36, 2000.

Inspire Record 524685 DOI 10.17182/hepdata.57430

The analysis of the data collected by the NA50 experiment in 1998, reported in this paper, extends and clarifies the pattern of the previously observed J/ ψ anomalous suppression. This new measurement, besides providing a deeper understanding of the previous observations, reveals a steady significative decrease in the J/ ψ production rate up to the most central Pb-Pb collisions. It clearly rules out the presently available conventional (hadronic) models of J/ ψ suppression, which unanimously predict a saturation of the J/ ψ rate for central Pb-Pb collisions. On the contrary and together with the sharp onset of the anomalous suppression previously reported, the new observation leads to a global production rate pattern which finds its natural explanation in the framework of the formation of a deconfined state of quarks and gluons.

3 data tables match query

Table 1

SIG(J/PSI)/SIG(DY) as a function of ET with the standard analyses of 1996. DATA 1996, standard analyses.

Table 2

SIG(J/PSI)/SIG(DY) as a function of ET with the minium bias analyses of 1996. DATA 1996, MB Analyses.

Table 3

SIG(J/PSI)/SIG(DY) as a function of E(NAME=TRANSVERSE) with the minium bias analyses of 1998. DATA 1998, MB Analyses.