Gluon multiple scattering and the transverse momentum dependence of J/ψ production in nucleus-nucleus collisions

Hüfner, J.; Kurihara, Y.; Pirner, Hans J.

doi:10.1016/0370-2693(88)91423-2

Cited by 121 publications

(55 citation statements)

References 13 publications

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“…At RHIC energy, the d-Au experiments show that there is litte normal suppression [34], we take σ abs = 0 in our calculation. The p t broadening [35] effect induced by gluon-nucleon elastic scattering in the initial state is reflected in the second term on the r.h.s of Eq. (16).…”

Section: Charmonium Transportmentioning

confidence: 99%

J/ψ transport in QGP and pt distribution at SPS and RHIC

Zhu

Zhuang

2005

Physics Letters B

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Combining the hydrodynamic equations for the QGP evolution and the transport equation for the primordially produced J/ψ in the QGP, we investigate the J/ψ transverse momentum distribution as well as its suppression in the √ s=17.3A GeV Pb-Pb collisions at SPS and √ s=200A GeV Au-Au collisions at RHIC. The two sets of equations are connected by the J/ψ anomalous suppression induced by its inelastic scattering with gluons in the QGP. The calculated centrality dependence of J/ψ suppression and average transverse momentum square agree well with the SPS data. From the comparison with the coalescence model where charm quark is fully thermalized, our calculated elliptical flow of the primordially produced J/ψ is much smaller. This may be helpful to differentiate the J/ψ production mechanisms in relativistic heavy ion collisions.

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Section: Charmonium Transportmentioning

confidence: 99%

J/ψ transport in QGP and pt distribution at SPS and RHIC

Zhu

Zhuang

2005

Physics Letters B

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“…For the purpose of our model, we shall assume that all cc pairs are created at the moment t = 0. Before the fusion, gluons can suffer multiple elastic scattering on nucleons and gain some additional transverse momentum in this way [24][25][26]. This manifests for instance in the observed broadening of the p T distribution of J/Ψ [27].…”

Section: J/ψ Absorption In Hadronic Mattermentioning

confidence: 99%

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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“…One must be careful in the interpretation of such ratios, particularly at p T < m, since, at fixed-target energies, the p T -dependent (p + A)/(p + p) ratios show that the J/ψ and Υ p T distributions are broader in p+A than in p+p interactions [41,42]. This broadening has been attributed to intrinsic parton p T kicks accrued by the interacting parton as it traverses the nucleus before interacting [43,44]. The magnitude of the average p T kick increases with A so that the p T -dependent (p + A)/(p + p) ratio is less than unity at low p T and increases above one with increasing p T .…”

Section: Baseline Total Cross Sectionsmentioning

confidence: 99%

Cold nuclear matter effects onJ/ψandϒproduction at energies available at the CERN Large Hadron Collider (LHC)

Vogt

2010

Phys. Rev. C

131

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The charmonium yields are expected to be considerably suppressed if a deconfined medium is formed in high-energy heavy-ion collisions. In addition, the bottomonium states, with the possible exception of the Υ(1S) state, are also expected to be suppressed in heavy-ion collisions. However, in proton-nucleus collisions the quarkonium production cross sections, even those of the Υ(1S), are also suppressed. These "cold nuclear matter" effects need to be accounted for before signals of the high density QCD medium can be identified in the measurements made in nucleus-nucleus collisions. We identify two cold nuclear matter effects important for midrapidity quarkonium production: "nuclear absorption", typically characterized as a final-state effect on the produced quarkonium state and shadowing, the modification of the parton densities in nuclei relative to the nucleon, an initialstate effect. We characterize these effects and study the energy, rapidity, and impact-parameter dependence of initial-state shadowing in this paper. I. BASELINE TOTAL CROSS SECTIONSTo better understand quarkonium suppression, it is necessary to have a good estimate of the expected yields. However, there are still a number of unknowns about quarkonium production in the primary nucleon-nucleon interactions. In this section, we discuss models of quarkonium production and give predictions for the yields in a number of collision systems. Since the LHC can collide either symmetric (A + A) or asymmetric (A + B) systems, we present results for p + p, p + A, d+A and A + A collisions. We consider d+A collisions since the d+A center-of-mass energy is closer to the A + A collision energy than top energy p + A collisions. The maximum ion beam energy per nucleon is the proton beam energy, E p = 7 TeV, times the charge-to-mass ratio, Z/A, of the ion beam. Thus the maximum deuteron beam energy is half that of the proton beam, E d = 3.5 TeV. The ion beam energies are given on the left-hand side of Table I for five reference nuclei: oxygen, In addition to the A + A center-of-mass energy, we also show the maximum p + A and d+A per nucleon center-ofmass energies, Table I shows the maximum nucleon-nucleon center-of-mass energy per nucleon, the rapidity difference between the two beams, y iA diff , and the center-of-mass shifts for p + A and d+A collisions. (The Z/A ratio is the same for d and O thus ∆y dO = 0.) Only √ s N N is given for symmetric A + A collisions since there is no rapidity shift. If there were no cold nuclear matter effects on the production cross sections at a given energy, the per nucleon cross sections would all be equal. However, the nuclear parton distributions (nPDFs) are known to be modified with

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Gluon multiple scattering and the transverse momentum dependence of J/ψ production in nucleus-nucleus collisions

Cited by 121 publications

References 13 publications

J/ψ transport in QGP and pt distribution at SPS and RHIC

J/ψ transport in QGP and pt distribution at SPS and RHIC

J/Ψsuppression in colliding nuclei: Statistical model analysis

Cold nuclear matter effects onJ/ψandϒproduction at energies available at the CERN Large Hadron Collider (LHC)

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