Pre-thermalization quark momentum distribution in the quark-gluon plasma

Chakraborty, Subenoy; Syam, D.

doi:10.1007/bf02748381

Cited by 21 publications

(21 citation statements)

References 7 publications

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“…The problem was posed over twenty years ago when the real prospects to create the quark-gluon plasma in terrestrial experiments appeared. Already in the early papers published in the eighties [17,18,19,20,21,22,23], main directions of further studies were drawn. The space-time structure of ultrarelativistic heavy-ion collisions was found [20] to provide an estimate of the system's temperature and the lower bound of the thermalization time.…”

Section: Equilibration Of the Quark-gluon Plasmamentioning

confidence: 99%

“…The space-time structure of ultrarelativistic heavy-ion collisions was found [20] to provide an estimate of the system's temperature and the lower bound of the thermalization time. The Boltzmann equation in the Relaxation Time Approximation [17] and the Fokker-Planck equation [18] were used to follow the equilibration process. The Schwinger mechanism of particle production was included in kinetic theory treatment of the thermalization [19,23] and the pure perturbative mechanism was analysed as well [22].…”

Section: Equilibration Of the Quark-gluon Plasmamentioning

confidence: 99%

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Early stage thermalization via instabilities

Mrówczyński¹

2007

Proceedings of Critical Point and Onset of Deconfinement — PoS(CPOD2006)

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Section: Equilibration Of the Quark-gluon Plasmamentioning

confidence: 99%

Section: Equilibration Of the Quark-gluon Plasmamentioning

confidence: 99%

Early stage thermalization via instabilities

Mrówczyński¹

2007

Proceedings of Critical Point and Onset of Deconfinement — PoS(CPOD2006)

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“…The FP equation describing the motion of the HQs in the QGP reads as [83,84] (for an alternative scenario, see [85]),…”

Section: Single Electron From the Heavy Flavoured Meson (Hfm) Decaymentioning

confidence: 99%

Electromagnetic probes of strongly interacting matter

Alam

2015

Pramana - J Phys

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The nuclear matter under extreme conditions of temperatures (T ) and baryonic densities (n B ) undergoes a phase transition to quark gluon plasma (QGP). It is expected that such extreme conditions can be achieved by colliding nuclei at ultrarelativistic energies. In the present review, the suitability of photons and dileptons as diagnostic tools of QGP has been discussed. The photon and dilepton spectra originating from heavy-ion collisions at LHC energies have been explicitly displayed in this article. Results from SPS and RHIC have been discussed adequately with appropriate references. The role of single electron spectra originating from the decays of heavy flavoured mesons on QGP detection has also been discussed briefly.

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“…The FP equation describing the motion of the nonequilibrated degrees of freedom (dof) in the bath of the equilibrated dof reads as [17,18],…”

Section: Pacsmentioning

confidence: 99%

“…The motion of the non-equilibrated HF mesons (D and B) in the expanding hadronic system is again described by the FP equations with drag and diffusion coefficients evaluated due to their interactions with hadronic matter. The solution of the FP equation for the D and B mesons at the freeze-out point encompassing the effects of drag of both the QGP and the hadronic phases has been used to determine the suppression in the high p T domain.The FP equation describing the motion of the nonequilibrated degrees of freedom (dof) in the bath of the equilibrated dof reads as [17,18],where f is the momentum distribution of the nonequilibrated dof, A i and B ij are related to the drag and diffusion coefficients. The interaction between the probe and the medium enter through the drag and diffusion coefficients.During their propagation through the QGP the HQs dissipate energy predominantly by two processes [7,8,19]: (i) collisional, e.g.…”

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confidence: 99%

Heavy flavor suppression: Role of hadronic matter

et al. 2013

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The role of hadronic matter in the suppression of open heavy flavored mesons has been studied. The heavy-quarks (HQs) suppression factors have been calculated and contrasted with the experimental data obtained from nuclear collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadronic Collider (LHC) experiments. It is found that the suppression in the hadronic phase at RHIC energy is around 20% − 25% whereas at the LHC it is around 10% − 12% for the D meson. In case of B meson the hadronic suppression is around 10% − 12% and 5% − 6% at RHIC and LHC energies respectively. Present study suggests that the suppression of heavy flavor in the hadronic phase is significant at RHIC. However, the effect of hadronic suppression at LHC is marginal, this makes the characterization of QGP at LHC less complicated. 24.85.+p; 05.20.Dd; 12.38.Mh One of the primary aims of the ongoing heavy-ion collision experiments at RHIC and LHC energies is to create and study the properties of Quark Gluon Plasma (QGP). The heavy flavours (HF) play a vital role to serve this purpose [1][2][3][4][5][6][7][8][9][10][11]. In particular the depletion of high transverse momentum (p T ) hadrons (D and B) produced in Nucleus + Nucleus collisions relative to those produced in proton + proton (p+p) collisions has been considered as an indicator of QGP formation. The STAR [12], PHENIX [13] and the ALICE [14] collaborations have measured this high p T depletion. To make the characterization of the QGP reliable the role of the hadronic matter should be taken into consideration and its contribution must be disentangled from the experimental observables. In this work an attempt has been made to estimate the effect of the hadronic phase on the nuclear suppressions of HFs. PACSWe study the evolution of the HFs in the following scenario. We assume that the light quarks, anti-quarks and gluons form a thermalized matter and the nonequilibrated heavy quarks(HQs) are moving through the expanding QGP background. While the evolution of the expanding QGP is described by the relativistic hydrodynamics with initial temperature and the thermalization time constrained by the measured charged particle multiplicity, the motion of the non-equilibrated HQ is described by the Fokker-Planck equation (FP) with drag and diffusion co-efficients arising due to the interaction of HQs with the expanding QGP background. The initial conditions for the distributions of HQs have been taken from the NLO pQCD results obtained for pp collisions by using the MNR code [15].The expanding QGP converts to hadronic system when it cools down to the transition temperature, T c . The solution of the FP equation for the charm and bottom quarks at the transition point is folded with the Peterson fragmentation function [16] to obtain the momentum distributions of the heavy flavoured mesons containing the effects of the interaction of the expanding QGP back-ground. The hadronic matter evolves in space and time described by relativistic hydrodynamics till the matter gets dilute enough to fre...

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Pre-thermalization quark momentum distribution in the quark-gluon plasma

Cited by 21 publications

References 7 publications

Early stage thermalization via instabilities

Early stage thermalization via instabilities

Electromagnetic probes of strongly interacting matter

Heavy flavor suppression: Role of hadronic matter

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