Duality and chiral restoration from low-mass dileptons at the CERN-SpS

Rapp, Ralf

doi:10.1016/s0375-9474(99)85006-4

Cited by 30 publications

(15 citation statements)

References 39 publications

(55 reference statements)

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“…Therefore, it seems likely that a quark hadron duality similar to that discussed for lowmass dilepton production [28] can be observed also in the D meson channel at the deconfinement transition. The spectral broadening of D mesons rather than their mass shift has been suggested for an explanation of anomalous J/ψ suppression in [13,14].…”

Section: Introductionmentioning

confidence: 68%

Dmesons at finite temperature and density in the Polyakov–Nambu–Jona-Lasinio model

Blaschke

Costa²,

Kalinovsky³

2012

Phys. Rev. D

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We study D-meson resonances in hot, dense quark matter within the NJL model and its Polyakovloop extension. We show that the mass splitting between D + and D − mesons is moderate, not in excess of 100 MeV. When the decay channel into quasifree quarks opens (Mott effect) at densities above twice saturation density, the decay width reaches rapidly the value of 200 MeV which entails a spectral broadening sufficient to open J/ψ dissociation processes. Contrary to results from hadronic mean-field theories, the chiral quark model does not support the scenario of a dropping D-meson masses so that scenarios for J/ψ dissociation by quark rearrangement built on the lowering of the threshold for this process in a hot and dense medium have to be reconsidered and should account for the spectral broadening.

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Section: Introductionmentioning

confidence: 68%

Dmesons at finite temperature and density in the Polyakov–Nambu–Jona-Lasinio model

Blaschke

Costa²,

Kalinovsky³

2012

Phys. Rev. D

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“…However, in Refs. [34,30] it was found that the hadronic dilepton rates following from the "melted" ρ close to T c rather closely resemble the rates computed in a partonic description, i.e., perturbative quark-antiquark annihilation. In the vacuum, such a phenomenon is well known from the e + e − annihilation into hadrons: for M ≥1.5 GeV the total cross section is well described within perturbative QCD using quark-antiquark final states, known as "parton-hadron duality", cf.…”

Section: Dilepton Spectroscopymentioning

confidence: 92%

The Chiral Restoration Transition of QCD and Low Mass Dileptons

Rapp¹,

Wambach²,

Hees³

2010

Relativistic Heavy Ion Physics

108

143

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Recent developments in the evaluation of vector-meson spectral functions in hot and dense matter are discussed with emphasis on connections to the chiral phase transition in QCD. Model independent approaches including chiral low-density expansions, lattice QCD, chiral and QCD sum rules are put into context with model predictions for in-medium vector-spectral function utilizing effective Lagrangians. Hadronic manybody calculations predict a strong broadening (and little mass shift) of the ρ spectral function which rapidly increases close to the expected phase boundary of hadronic and quark-gluon matter. Pertinent dilepton rates appear to degenerate with perturbative quark-antiquark annihilation in the Quark-Gluon Plasma, suggestive for chiral symmetry restoration. Applications to low-mass dilepton spectra in heavy-ion collisions result in quantitative agreement with recent high-quality data at the CERN-SPS. Thermal radiation from temperatures around T c consistently reproduces the experimental dilepton excess observed at masses above 1 GeV as well. The interpretation of dilepton sources at high transverse momentum appears to be more involved.

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“…The number of models with different underlying scenarios both partonic and hadronic were developed. 21,26,22,23,24 It turns out that all calculations led to similar results because in fact the dilepton production rates calculated via hadronic and partonic models are very similar at SPS conditions.…”

Section: Low-mass Dilepton Productionmentioning

confidence: 84%

Quark Gluon Plasma - Recent Advances

Odyniec

2002

Int. J. Mod. Phys. A

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While heavy ion collisions at the SPS have produced excited strongly interacting matter near the conditions for quark deconfinement, the RHIC may be the first machine capable of creating quarkantiquark plasmas sufficiently long-lived to allow deep penetration into the new phase. A comprehensive experimental program addressing this exciting physics has been put into place. Presented here are preliminary results from Au+Au at √ S = 130 GeV obtained during the first RHIC run and some CERN SPS results from Pb+Pb at √ S = 17 GeV (particularly relevant to QGP search).

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Duality and chiral restoration from low-mass dileptons at the CERN-SpS

Cited by 30 publications

References 39 publications

Dmesons at finite temperature and density in the Polyakov–Nambu–Jona-Lasinio model

Dmesons at finite temperature and density in the Polyakov–Nambu–Jona-Lasinio model

The Chiral Restoration Transition of QCD and Low Mass Dileptons

Quark Gluon Plasma - Recent Advances

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