Probing hadronization with strangeness

Bass, Steffen A.; Danielewicz, Paweł; Dumitru, Adrian; Pratt, Scott

doi:10.1088/0954-3899/27/3/348

Cited by 13 publications

(15 citation statements)

References 53 publications

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“…The Cooper-Frye formalism [23] is then used to decay fluid elements to hadrons by assuming local statistical hadronization. Many calculations also include the important non-equilibrium rescattering between hadrons after hadronization up to the point of freeze-out [24,25].…”

Section: Freeze-out From Hydrodynamicsmentioning

confidence: 99%

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Quasiparticle degrees of freedom versus the perfect fluid as descriptors of the quark-gluon plasma

et al. 2008

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The hot nuclear matter created at the Relativistic Heavy Ion Collider (RHIC) has been characterized by near-perfect fluid behavior. We demonstrate that this stands in contradiction to the identification of QCD quasi-particles with the thermodynamic degrees of freedom in the early (fluid) stage of heavy ion collisions. The empirical observation of constituent quark "nq" scaling of elliptic flow [1] is juxtaposed with the lack of such scaling behavior in hydrodynamic fluid calculations followed by Cooper-Frye freeze-out to hadrons. A "quasi-particle transport" time stage after viscous effects break down the hydrodynamic fluid stage, but prior to hadronization, is proposed to reconcile these apparent contradictions. However, without a detailed understanding of the transitions between these stages, the "nq" scaling is not a necessary consequence of this prescription. Also, if the duration of this stage is too short, it may not support well defined quasi-particles. By comparing and contrasting the coalescence of quarks into hadrons with the similar process of producing light nuclei from nucleons, it is shown that the observation of "nq" scaling in the final state does not necessarily imply that the constituent degrees of freedom were the relevant ones in the initial state.

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Section: Freeze-out From Hydrodynamicsmentioning

confidence: 99%

“…as implemented in Ref. [24]) while allowing in principle for "n q " scaling. With better knowledge of the quasi-particle masses and quantum numbers it could be possible to implement a multi-stage dynamical model incorporating all of these with realistic transport.…”

Section: Quasi-particle Implicationsmentioning

confidence: 99%

Quasiparticle degrees of freedom versus the perfect fluid as descriptors of the quark-gluon plasma

et al. 2008

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“…Particle spectra result from a collective, transverse expansion of the matter coupled with subsequent thermal emission [11,12]. Possible rescattering and resonance decays have been modelled and the conclusion, that at some stage of the expansion a dense locally equilibrated fireball is formed, remains unchanged [13,14]. Another measured quantity directly resulting from the collective expansion is the elliptic flow.…”

Section: Introductionmentioning

confidence: 99%

Rapid hydrodynamic expansion in relativistic heavy-ion collisions

Božek

Wyskiel

2009

Phys. Rev. C

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Hydrodynamic expansion of the hot fireball created in relativistic Au-Au collisions at √ s = 200GeV in 3 + 1-dimensions is studied. We obtain a simultaneous, satisfactory description of the transverse momentum spectra, elliptic flow and pion correlation radii for different collision centralities and different rapidities. Early initial time of the evolution is required to reproduce the interferometry data, which provides a strong indication of the early onset of collectivity. We can also constraint the shape of the initial energy density in the beam direction, with a relatively high initial energy density at the center of the fireball.

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“…In the case of nondegenerate gas, the absorption coefficient can be determined by the following formula [29,31]…”

Section: Absorption Coefficientmentioning

confidence: 99%

Hybrid–impurity resonances in anisotropic quantum dots

Margulis

Shorokhov

2009

Physica E: Low-dimensional Systems and Nanostructures

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The absorption of electromagnetic radiation of an anisotropic quantum dot is theoretically investigated taking into account the processes associated with simultaneous scattering from ionized impurities. It is shown that the scattering of electrons by impurities leads to the resonance absorption even if we have only one impurity in the quantum dot. Explicit formula is derived for the absorption coefficient. The positions of the resonances peaks are found. The effects of external magnetic field on the resonance absorption are studied.

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Probing hadronization with strangeness

Cited by 13 publications

References 53 publications

Quasiparticle degrees of freedom versus the perfect fluid as descriptors of the quark-gluon plasma

Quasiparticle degrees of freedom versus the perfect fluid as descriptors of the quark-gluon plasma

Rapid hydrodynamic expansion in relativistic heavy-ion collisions

Hybrid–impurity resonances in anisotropic quantum dots

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