Charmonia enhancement in quark–gluon plasma with improved description of c-quarks phase distribution

Gossiaux, Pol Bernard; Guiho, Vincent; Aichelin, J.

doi:10.1088/0954-3899/31/6/062

Cited by 17 publications

(38 citation statements)

References 7 publications

(17 reference statements)

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“…As shown, the D/π ratio is enhanced significantly as compared to p-p collisions. The enhancement factor varies from 2.5 to 4 in the p ⊥ range (5-10) GeV/c because of the uncertainties of different choices of parameter set to parametrize the heavy hadron spectra as depicted in (48). However, the ratio also strongly depends on the quenching of light quark jets.…”

Section: Quenching Of Hadron Spectra In An Expanding Plasmamentioning

confidence: 99%

“…Since neither the drag nor diffusion coefficients have been calculated for other than collisional processes, it is not possible to infer the impact of radiative processes directly within our model. To circumvent our lack of knowledge of radiative processes in terms of the transport coefficients, we consider an alternative set [48] within our model, obtained by multiplying the transport coefficients by a factor K = 2. It is our hope that the experimental data will allow us to fix an approximate value of K, if at all required.…”

Section: Quenching Of Hadron Spectra In An Expanding Plasmamentioning

confidence: 99%

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Energy loss of charm quarks in the quark-gluon plasma: Collisional vs radiative losses

Mustafa

2005

Phys. Rev. C

207

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In considering the collisional energy loss rates of heavy quarks from hard light parton interactions, we computed the total energy loss of a charm quark for a static medium. For the energy range E ∼ 5-10 GeV of charm quark, it proved to be almost the same order as that of radiative ones estimated to a first-order opacity expansion. The collisional energy loss becomes much more important for lower energy charm quarks, and this feature could be very interesting for the phenomenology of hadrons spectra. Using such collisional energy loss rates, we estimate the momentum loss distribution employing a Fokker-Planck equation and the total energy loss of a charm quark for an expanding quark-gluon plasma under conditions resembling the energies presently available at the BNL Relativistic Heavy Ion Collider. The fractional collisional energy loss is found to be suppressed by a factor of 5 as compared to the static case and does not depend linearly on the system size. We also investigate the heavy to light hadrons D/π ratio at moderately large (5-10 GeV/c) transverse momenta and comment on its enhancement.

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Section: Quenching Of Hadron Spectra In An Expanding Plasmamentioning

confidence: 99%

Section: Quenching Of Hadron Spectra In An Expanding Plasmamentioning

confidence: 99%

Energy loss of charm quarks in the quark-gluon plasma: Collisional vs radiative losses

Mustafa

2005

Phys. Rev. C

207

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“…In recent years considerable efforts have been devoted to its extension and reliable implementation for relativistic systems [1][2][3][4][5]. In particular, it has been applied in the studies of heavy-quark (HQ) diffusion in the Quark-Gluon Plasma (QGP) [6][7][8][9][10], in order to evaluate transport properties of the medium produced in ultrarelativistic heavy-ion collisions (URHICs) (see, e.g., Ref. [11] for a recent review).…”

Section: Introductionmentioning

confidence: 99%

Relativistic Langevin dynamics in expanding media

Hees

Gossiaux

et al. 2013

Phys. Rev. E

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We study the consequences of different realizations of diffusion processes in relativistic Langevin simulations. We elaborate on the Ito-Stratonovich dilemma by showing how microscopically calculated transport coefficients as obtained from a Boltzmann/Fokker-Planck equation can be implemented to lead to an unambiguous realization of the Langevin process. Pertinent examples within the pre-point (Ito) and post-point (Hänggi-Klimontovich) Langevin prescriptions are worked out explicitly. Deviations from this implementation are shown to generate variants of the Boltzmann distribution as the stationary (equilibrium) solutions. Finally, we explicitly verify how the Lorentz invariance of the Langevin process is maintained in the presence of an expanding medium, including the case of an "elliptic flow" transmitted to a Brownian test particle. This is particularly relevant for using heavy-flavor diffusion as a quantitative tool to diagnose transport properties of QCD matter as created in ultrarelativistic heavy-ion collisions.

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“…To substantiate level-1 s.e.p., we notice that the elastic cross section and hence the collisional energy loss introduced in early approaches [4] has to be multiplied [5] by an artificial K factor of the order of 10 to match the experimental data. These ‡ Although one observes similar fact for light-quark leading hadrons, it is not clear whether the dominant basic microscopic processes are of similar nature for these two probes, due to the heavy quark finite-mass and the flavor exchange mechanism.…”

Section: Introductionmentioning

confidence: 99%

Competition of heavy quark radiative and collisional energy loss in deconfined matter

Gossiaux

Aichelin

Gousset

et al. 2010

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

158

168

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Abstract. We extend our recently advanced model on collisional energy loss of heavy quarks in a quark gluon plasma (QGP) by including radiative energy loss. We discuss the approach and present first preliminary results, including a comparison of the role of both types of energy loss for experimental data. We draw the conclusion that the present nuclear modification factor R AA data on non-photonic single electrons does not permit to "select" between this two types of energy-loss mechanisms.

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Charmonia enhancement in quark–gluon plasma with improved description of c-quarks phase distribution

Cited by 17 publications

References 7 publications

Energy loss of charm quarks in the quark-gluon plasma: Collisional vs radiative losses

Energy loss of charm quarks in the quark-gluon plasma: Collisional vs radiative losses

Relativistic Langevin dynamics in expanding media

Competition of heavy quark radiative and collisional energy loss in deconfined matter

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