Charmonium suppression and regeneration from SPS to RHIC

Grandchamp, L.; Rapp, Ralf

doi:10.1016/s0375-9474(02)01027-8

Cited by 218 publications

(253 citation statements)

References 78 publications

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“…[20,21]). Furthermore, J /ψ production was found to be sensitive to the in-medium properties of charm quarks, that is, their in-medium masses and degree of kinetic equilibration [17,22,23].…”

Section: Introductionmentioning

confidence: 99%

Thermalization of heavy quarks in the quark-gluon plasma

2005

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Charm-and bottom-quark rescattering in a quark-gluon plasma (QGP) is investigated with the objective of assessing the approach toward thermalization. Employing a Fokker-Planck equation to approximate the collision integral of the Boltzmann equation we augment earlier studies based on perturbative parton cross sections by introducing resonant heavy-light quark interactions. The latter are motivated by recent QCD lattice calculations that indicate the presence of "hadronic" states in the QGP. We model these states by colorless (pseudo-) scalar and (axial-) vector D and B mesons within a heavy-quark effective theory framework. We find that the presence of these resonances at moderate QGP temperatures substantially accelerates the kinetic equilibration of c quarks as compared to using perturbative interactions. We also comment on consequences for D-meson observables in ultrarelativistic heavy-ion collisions.

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Section: Introductionmentioning

confidence: 99%

Thermalization of heavy quarks in the quark-gluon plasma

2005

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“…Recently, there appeared another kind of models [14,15] based on the assumption that charmonium is created at QCD hadronization according to statistical law, which is the extrapolation of the well-tested thermal model [16] for light hadrons. There is also a two component model [17] which mixes these two kinds of mechanisms. With some adjustable parameters in each mechanism, almost all models can describe the J/ψ anomalous suppression data at SPS very well.…”

Section: Introductionmentioning

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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“…The case of absorption appears when the imaginary part is Im[ω 2 (T )] < 0. The regeneration scenario [31,32,34,35,36,37,38] corresponds to Im[ω 2 (T )] > 0 in the THO model which stems from the coupling of the charmonium hamiltonian to open charm channels. In addition we shall consider a gaussian wave function for initial QQ state.…”

Section: (T )] + I Im[ω 2 (T )]mentioning

confidence: 99%

“…Once the partial densities of open charm mesons becomes nonnegligible, also the reverse processes of charmonium regeneration in channels like, e.g., D +D → J/ψ + ρ will occur. J/ψ re-generation shall give important contributions to charmonium production in heavy-ion collisions already at RHIC [31,32,33,34,35,36] and the more at the LHC [37,38]. The situation is well summarized in two recent reviews [39,40].…”

Section: Introductionmentioning

confidence: 99%

Quantum mechanical model for J/ψ suppression in the LHC era

Peña

Blaschke

2014

Nuclear Physics A

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We discuss the interplay of screening, absorption and regeneration effects, on the quantum mechanical evolution of quarkonia states, within a time-dependent harmonic oscillator (THO) model with complex oscillator strength. We compare the results with data for R AA /R AA (CNM) from CERN and RHIC experiments. In the absence of a measurement of cold nuclear matter (CNM) effects at LHC we estimate their role and interpret the recent data from the ALICE experiment. We also discuss the temperature dependence of the real and imaginary parts of the oscillator frequency which stand for screening and absorption/regeneration, respectively. We point out that a structure in the J/ψ suppression pattern for In-In collisions at SPS is possibly related to the recently found X(3872) state in the charmonium spectrum. Theoretical support for this hypothesis comes from the cluster expansion of the plasma Hamiltonian for heavy quarkonia in a strongly correlated medium.

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Charmonium suppression and regeneration from SPS to RHIC

Cited by 218 publications

References 78 publications

Thermalization of heavy quarks in the quark-gluon plasma

Thermalization of heavy quarks in the quark-gluon plasma

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

Quantum mechanical model for J/ψ suppression in the LHC era

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