Critical Opacity: A Possible Explanation of the Fast Thermalization Times Seen in BNL RHIC Experiments

Gastineau, F.; Blanquier, Eric; Aichelin, J.

doi:10.1103/physrevlett.95.052001

Cited by 9 publications

(23 citation statements)

References 27 publications

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“…Another possible explanation is, e.g. a dramatic increase of all s-channel transition rates in the vicinity of the chiral phase transition [59], which causes a critical opacity and fast thermalization in the system. Finally, the centrality dependence of the total, i.e.…”

Section: Figmentioning

confidence: 99%

Anisotropic flow of charged and identified hadrons in thequark-gluon string model for Au+Au collisions atsNN=200GeV

et al. 2005

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The pseudorapidity behaviour of the azimuthal anisotropy parameters v1 and v2 of inclusive charged (h ± ) hadrons and their dependence on the centrality has been studied in Au+Au collisions at full RHIC energy of √ sNN = 200 GeV within the microscopic quark-gluon string model. The QGSM simulation results for the directed flow v1 show antiflow alignment within the pseudorapidity range |η| ≤ 2 in a fair agreement with the experimental v1(η) data, but cannot reproduce the further development of the antiflow up to |η| ≈ 3.5. The η dependence of the elliptic flow v2 extracted from the simulations agrees well with the experimental data in the whole pseudorapidity range for different centrality classes. The centrality dependence of the integrated elliptic flow of charged hadrons in the QGSM almost coincides with the PHOBOS experimental distribution. The transverse momentum dependence of the elliptic flow of identified (π ± , K ± , p,p) and inclusive charged hadrons is studied also. The model reproduces quantitatively the low-pT part of the distributions rather good, but underestimates the measured elliptic flow for transverse momenta pT > 1 GeV/c. Qualitatively, however, the model is able to reproduce the saturation of the v2(pT ) spectra with rising pT as well as the crossing of the elliptic flow for mesons and baryons.

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Section: Figmentioning

confidence: 99%

Anisotropic flow of charged and identified hadrons in thequark-gluon string model for Au+Au collisions atsNN=200GeV

et al. 2005

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“…If the source is dense it is more probable to emit from the surface than from the center and source is called opacity following the idea of Heiselberg and Vischer [36,38,40]. In Glauber theory, particles are emitted from a surface layer with a depth of order of the mean free path λ f with [39] S…”

Section: The Expression Of Complex Phase φmentioning

confidence: 98%

“…Opaque sources emit particles from a thin shell near the fireball surface since source sizes and densities are large in relativistic heavy ion collisions [37][38][39][40][41][42][43][44]. The fact particle emitting away from its surface is inspired by the hydrodynamical as well as cascade calculation [36].…”

Section: Introductionmentioning

confidence: 99%

Effects of source opacity and expansion on two-pion Bose-Einstein correlations

Sun

De-hang

2011

Sci. China Phys. Mech. Astron.

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We examine two-pion Bose-Einstein correlations for partially coherent particle-emitting sources within quantum statistical formalism, where the sources are treated as classical currents with chaotic and coherent components. The two-pion correlation functions of the partially coherent sources contain a phase which is sensitive to the asymmetry of the source emission function. We investigate the influence of source opacity and expansion in high energy heavy ion collisions on the phase by Monte Carlo calculations. We find that these two physical effects shift the phase from zero. The Gaussian-formula fit results to the simulated two-pion correlation functions indicate that the opaque and expansion effects lead to a smaller interferometry radius R out and a larger λ parameter.two-pion correlation, partially coherent sources, asymmetry 25.75.Nq, 25.75.Gz

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“…Recently, Gastineau, Blanquier, and Aichelin have proposed a model of critical opacity based upon their calculation of the qq interaction for temperatures in the range of 0 -350 MeV [2]. A central feature of their model is the temperature dependence of masses of the u, d, and s quarks, as well as the masses of the and K mesons.…”

mentioning

confidence: 99%

“…(3) and (4) we have modified the notation of Ref. [2] to be in closer correspondence to the notation we have used in our work.) In Ref.…”

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confidence: 99%

Comparison of models of critical opacity in the quark-gluon plasma

Shakin

2004

Phys. Rev. C

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In this work we discuss two methods of calculation of quark propagation in the quark-gluon plasma. Both methods make use of the Nambu-Jona-Lasinio model. The essential difference of these calculations is the treatment of deconfinement. A model of confinement is not included in the work of Gastineau, Blanquier, and Aichelin (e-print hep-ph/0404207), however, the meson states they consider are still bound for temperatures greater than the deconfinement temperature T c . On the other hand, our model deals with unconfined quarks and includes a description of the qq resonances found in lattice QCD studies that make use of the maximum entropy method. We compare the qq cross sections calculated in these models.

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Critical Opacity: A Possible Explanation of the Fast Thermalization Times Seen in BNL RHIC Experiments

Cited by 9 publications

References 27 publications

Anisotropic flow of charged and identified hadrons in thequark-gluon string model for Au+Au collisions atsNN=200GeV

Anisotropic flow of charged and identified hadrons in thequark-gluon string model for Au+Au collisions atsNN=200GeV

Effects of source opacity and expansion on two-pion Bose-Einstein correlations

Comparison of models of critical opacity in the quark-gluon plasma

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