J∕ψ absorption in a multicomponent hadron gas

Prorok, Dariusz; Turko, L.; Blaschke, D.; Jean-Philippe, Lansberg; Matagne, Nicolas

doi:10.1063/1.2987189

Cited by 6 publications

(18 citation statements)

References 29 publications

(66 reference statements)

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“…Speed of sound is related to the speed of small perturbations produced in the QCD matter in its local rest frame. A minimum in c s has also been interpreted in terms of a phase transition point [39][40][46][47][48][49][50][51] where a large number of degrees of freedom present in the medium causes difficulty in its propagation. Further, Chojnacki and Florkowski [52] have proposed that a shallow minimum in the speed of sound near the smooth joining of HG and QGP phases in a hybrid model description corresponds to the presence of a cross-over transition.…”

Section: Critical Point (Cp) and Order Of Phase Transitionmentioning

confidence: 99%

Hybrid model for QCD deconfining phase boundary

Srivastava

Singh

2012

Phys. Rev. D

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Intensive search for a proper and realistic equations of state (EOS) is still continued for studying the phase diagram existing between quark gluon plasma (QGP) and hadron gas (HG) phases.Lattice calculations provide such EOS for the strongly interacting matter at finite temperature (T ) and vanishing baryon chemical potential (µ B ). These calculations are of limited use at finite µ B due to the appearance of notorious sign problem. In the recent past, we had constructed a hybrid model description for the QGP as well as HG phases where we make use of a new excluded-volume model for HG and a thermodynamically-consistent quasiparticle model for the QGP phase and used them further to get QCD phase boundary and a critical point. Since then many lattice calculations have appeared showing various thermal and transport properties of QCD matter at finite T and µ B = 0. We test our hybrid model by reproducing the entire data for strongly interacting matter and predict our results at finite µ B so that they can be tested in future. Finally we demonstrate the utility of the model in fixing the precise location, the order of the phase transition and the nature of CP existing on the QCD phase diagram. We thus emphasize the suitability of the hybrid model as formulated here in providing a realistic EOS for the strongly interacting matter.

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Section: Critical Point (Cp) and Order Of Phase Transitionmentioning

confidence: 99%

Hybrid model for QCD deconfining phase boundary

Srivastava

Singh

2012

Phys. Rev. D

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“…The rapidity-momentum J/ψ distribution results from the kinematical change of variables d 3 p → d 2 p T dy and is given by F( r, y, p T , t) = M T cosh(y) ×f ( r, p, t), where f ( r, p, t) is the formal solution of a kinetic equation (for details see [16,24,18]). …”

Section: J/ψ Absorptionmentioning

confidence: 99%

“…Both PHENIX results, concerning rapidity and N part dependencies of J/ψ suppression in Au-Au and Cu-Cu collisions are simultaneously reproduced. More details are given in [18].…”

Section: Introductionmentioning

confidence: 99%

“…The formalism allows [16,17] for a unified description of the data from the NA38 and NA50 experiments at CERN and from the PHENIX experiment at RHIC. Both PHENIX results, concerning rapidity and N part dependencies of J/ψ suppression in Au-Au and Cu-Cu collisions are simultaneously reproduced.…”

Section: Introductionmentioning

confidence: 99%

“…In the real situation the width of the matter at t 0 is also of the order of 1 fm. Then matter starts to expand and cool according to relativistic hydrodynamics (for details see [16,17,23,24]) until reaching the freeze-out temperature T f.o. and subsequently freely streaming towards the detectors.…”

Section: Introductionmentioning

confidence: 99%

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Charmonium suppression at RHIC and SPS: a unified approach

Turko¹,

Prorok²,

Blaschke³

2010

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

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Charmonium suppression at RHIC and SPS: A hadronic baseline

2010

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A kinetic equation approach is applied to model anomalous J/ψ suppression at RHIC and SPS by absorption in a hadron resonance gas which successfully describes statistical hadron production in both experiments. The puzzling rapidity dependence of the PHENIX data is reproduced as a geometric effect due to a longer absorption path for J/ψ production at forward rapidity.Keywords: J/ψ suppression, heavy-ion collisions, hadron gas PACS: 14.40.Gx, 24.10.Pa, 25.75.-q IntroductionThe effect of J/ψ suppression [1] is one of the diagnostic tools to prove quark-gluon plasma (QGP) formation in heavy-ion collisions. After a rich phenomenology provided by the CERN-SPS experiments NA3, NA38, NA50 and NA60, which nevertheless could not unambiguously prove QGP formation, the situation became even more complex due to first results from RHIC experiments PHENIX and STAR. New experiments are planned at CERN-LHC and FAIR-CBM, for a recent review, see [2]. In order to make progress in the interpretation of experimental findings it is important to define benchmarks, such as a baseline from a statistical kinetic model provided in this communication, which is based on a purely hadronic description.Measurements of J/ψ suppression in Au-Au and Cu-Cu collisions by STAR and PHENIX experiments [3,4,5] brought up two unexpected re-

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J∕ψ absorption in a multicomponent hadron gas

Cited by 6 publications

References 29 publications

Hybrid model for QCD deconfining phase boundary

Hybrid model for QCD deconfining phase boundary

Charmonium suppression at RHIC and SPS: a unified approach

Charmonium suppression at RHIC and SPS: A hadronic baseline

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