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Vogt, Matthias A.

doi:10.1007/978-3-663-08935-3

Cited by 13 publications

(6 citation statements)

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“…The resonance(s) could also be dissociated either by an energetic gluon [10,11] or by a comoving hadron. A complete and deep understanding of the various stages of absorption is still missing and is under intense investigations [12]. In order to disentangle these different effects, we must know the properties of quarkonium in medium and determine their dissociation temperatures.…”

Section: Introductionmentioning

confidence: 99%

Charmonium suppression in the presence of dissipative forces in a strongly-coupled quark–gluon plasma

2010

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We study the survival of charmonium states in a strongly-coupled quark-gluon plasma in the presence of dissipative forces. We consider first-order dissipative corrections to the plasma equation of motion in the Bjorken boost-invariant expansion with a strongly-coupled equation of state for QGP and study the survival of these states with the dissociation temperatures obtained by correcting the full Cornell potential not its Coulomb part alone with a dielectric function encoding the effects of deconfined medium. We further explore the sensitivity of prompt and sequential suppression of these states to the shear viscosity-to-entropy density ratio, η/s from perturbative QCD and AdS/CFT predictions. Our results show excellent agreement with the recent experimental results at RHIC.PACS: 12.38.Mh,

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Section: Introductionmentioning

confidence: 99%

Charmonium suppression in the presence of dissipative forces in a strongly-coupled quark–gluon plasma

2010

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“…Over the years, several groups have measured the J/ψ yield in heavy ion collisions (for a review of the data prior to RHIC energy collisions, and the interpretations see Refs. [4,5]). In brief, experimental data do show suppression.…”

Section: Introductionmentioning

confidence: 99%

J/ψ suppression in the threshold model at RHIC and LHC energy

Chaudhuri¹

2008

J. Phys. G: Nucl. Part. Phys.

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In the QGP based threshold model [1,2], in addition to the normal nuclear absorption, J/ψ's are subjected to an 'anomalous' suppression such that above a threshold density n J/ψ , all the J/ψ's are melted. In the threshold model we have analysed the recent PHENIX data on the centrality dependence of J/ψ suppression in Au+Au collisions at RHIC. Feedback from decay of the state χ is accounted for. J/ψ's are anomalously suppressed above a threshold density, n J/ψ = 3.57 ± 0.17 f m −2 . Threshold density for anomalous suppression of the state χ is uncertain to a large extent, nχ = 0.32 ± 0.32 f m −2 . The fraction F of the state χ can not be determined unambiguously, depending on the nuclear absorption, it can vary from 20% to 40%. We have also predicted for the suppression in Pb+Pb collisions at LHC energy. In central Pb+Pb collisions, J/ψ's are suppressed by a factor of 3-4. Suppression pattern is rather similar to that in Au+Au collisions, if not slighty less in central collisions. Using the PHENIX data on the participant number dependence of the Bjorken energy density, we have also estimated the QGP formation time. For critical temperature Tc=192 MeV, estimated QGP formation time ranges between 0.07-0.09 fm/c.

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“…Over the years, several groups have measured the J/ψ yield in heavy ion collisions (for a review of the data prior to RHIC energy collisions, and the interpretations see Refs. [2,3]). In brief, experimental data do show suppression.…”

Section: Introductionmentioning

confidence: 99%

Sequential melting of charmonium states in an expanding quark–gluon plasma andJ/ψ suppression at RHIC and LHC energy collisions

Chaudhuri¹

2008

J. Phys. G: Nucl. Part. Phys.

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We have developed a hydrodynamic model to study sequential melting of charmonium states in an expanding QGP medium. According to the initial fluid temperature profile, J/ψ's are randomly distributed in the transverse plane. As the fluid evolve in time, the free streaming J/ψ's are suppressed if the local fluid temperature exceeds a critical temperature. PHENIX data on the centrality dependence of J/ψ suppression in Au+Au collisions at mid-rapidity are explained by sequential melting of the charmonium states, χc, ψ′ and J/ψ, in the expanding medium. The critical temperatures T J/ψ ≈ 2.09Tc and Tχ = Tχ c = T ψ′ ≈ 1.1Tc agree with lattice motivated calculations. The feed-down fraction F depend on whether the cold nuclear matter effect is included or not. It changes from F = 0.3 with cold nuclear matter effect included to F = 0.5 when the effect is neglected. Model fails to reproduce the PHENIX data on the centrality dependence of J/ψ suppression in Cu+Cu collisions at mid-rapidity, indicating that the mechanism of J/ψ suppression is different in Au+Au and in Cu+Cu collisions. We also use the model to predict for the centrality dependence of J/ψ suppression in Pb+Pb collisions at LHC energy, √ s=5500 GeV. In LHC energy, J/ψ's are more suppressed in mid central collisions than in Au+Au collisions at RHIC energy. PACS numbers: PACS numbers: 25.75.-q, 25.75.Dw

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Sanierungsplanung

Cited by 13 publications

References 0 publications

Charmonium suppression in the presence of dissipative forces in a strongly-coupled quark–gluon plasma

Charmonium suppression in the presence of dissipative forces in a strongly-coupled quark–gluon plasma

J/ψ suppression in the threshold model at RHIC and LHC energy

Sequential melting of charmonium states in an expanding quark–gluon plasma andJ/ψ suppression at RHIC and LHC energy collisions

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