Microscopic dynamics of disoriented chiral condensate formation

Serreau, Julien

doi:10.1103/physrevd.63.054003

Cited by 9 publications

(14 citation statements)

References 18 publications

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“…This question has been investigated in Ref. [97], where a detailed statistical analysis of the pion field configurations produced after a quench has been performed, with particular emphasis on their isospin structure. For this purpose, it is sufficient to consider the original model of Rajagopal and Wilczek [10], see subsection 2.2.1, which includes all the relevant physical features.…”

Section: The Unpolarized DCCmentioning

confidence: 99%

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Disoriented chiral condensate: Theory and experiment

Mohanty

Serreau

2005

Physics Reports

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It is thought that a region of pseudo-vacuum, where the chiral order parameter is misaligned from its vacuum orientation in isospin space, might occasionally form in high energy hadronic or nuclear collisions. The possible detection of such disoriented chiral condensate (DCC) would provide useful information about the chiral structure of the QCD vacuum and/or the chiral phase transition of strong interactions at high temperature. We review the theoretical developments concerning the possible DCC formation in high-energy collisions as well as the various experimental searches that have been performed so far. We discuss future prospects for upcoming DCC searches, e.g. in high-energy heavy-ion collision experiments at RHIC and LHC.

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Section: The Unpolarized DCCmentioning

confidence: 99%

“…32 For a more detailed analysis, see Ref. [97]. wheren a (k) ≡n a (k, t f ) represent the averaged occupation numbers corresponding to the classical field configuration at the final time t f , see Eq.…”

Section: The Unpolarized DCCmentioning

confidence: 99%

Disoriented chiral condensate: Theory and experiment

Mohanty

Serreau

2005

Physics Reports

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“…For instance, the thermalization of an idealized form of color glass condensate [10] was studied by Bjoraker and Venugopalan by [11] solving the Landau transport equation. Serreau and Schiff also investigated the same topic in [12] where they used the relaxation time approximation to simplify the collision term in the Boltzmann equation.…”

Section: Introductionmentioning

confidence: 99%

Thermalization of a color glass condensate and review of the “bottom–up” scenario

El¹,

Xu²,

Greiner³

2008

Nuclear Physics A

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The thermalization of a longitudinally expanding color glass condensate with Bjorken boost invariant geometry is investigated within microscopical parton cascade BAMPS. Our main focus lies on the detailed comparison of thermalization, observed in BAMPS with that suggested in the "Bottom-Up" scenario. We demonstrate that the tremendous production of soft gluons via gg → ggg, which is shown in the "Bottom-Up" picture as the dominant process during the early preequilibration, will not occur in heavy ion collisions at RHIC and LHC energies, because the back reaction ggg → gg hinders the absolute particle multiplication. Moreover, contrary to the "Bottom-Up" scenario, soft and hard gluons thermalize at the same time. The time scale of thermal equilibration in BAMPS calculations is of order α −2 s (ln α s ) −2 Q −1 s . After this time the gluon system exhibits nearly hydrodynamical behavior. The shear viscosity to entropy density ratio has a weak dependence on Q s and lies close to the lower bound of the AdS/CFT conjecture.

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“…In addition, Serreau and Schiff [ 5] have studied the role of elastic processes in kinetic equilibration using minijets as well as color glass condensate as initial conditions and found that in all cases elastic interactions alone cannot drive the system rapidly to kinetic equilibrium. It is interesting to see whether the situation changes when the inelastic gg ↔ ggg processes are included.…”

Section: Introductionmentioning

confidence: 99%

Thermalization of gluons at RHIC: Dependence on initial conditions

Greiner

2006

Eur. Phys. J. A

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We investigate how thermalization of gluons depends on the initial conditions assumed in ultrarelativistic heavy ion collisions at RHIC. The study is based on simulations employing the pQCD inspired parton cascade solving the Boltzmann equation for gluons. We consider independently produced minijets with p T > p 0 = 1.3 ∼ 2.0 GeV and a color glass condensate as possible initial conditions for the freed gluons. It turns out that full kinetic equilibrium is achieved slightly sooner in denser system and its timescale tends to saturate. Compared with the kinetic equilibration we find a stronger dependence of chemical equilibration on the initial conditions.

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Microscopic dynamics of disoriented chiral condensate formation

Cited by 9 publications

References 18 publications

Disoriented chiral condensate: Theory and experiment

Disoriented chiral condensate: Theory and experiment

Thermalization of a color glass condensate and review of the “bottom–up” scenario

Thermalization of gluons at RHIC: Dependence on initial conditions

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