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Bleicher, Joan Kristin

doi:10.5771/1615-634x-2000--571

Cited by 122 publications

(194 citation statements)

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“…Marcus Bleicher discussed elliptic flow at RHIC in the framework of the microscopic hadron/string UrQMD and RQMD transport models [65,66]. Both models reach only 60% of the absolute magnitude of the measured v 2 , due to the string degrees of freedom being used to describe the initial phase in these models generating insufficient pressure.…”

Section: Transport Theorymentioning

confidence: 99%

SQM 2006: theory summary and perspectives

Bass¹

2006

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

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Section: Transport Theorymentioning

confidence: 99%

SQM 2006: theory summary and perspectives

Bass¹

2006

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

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“…It became popular to interpret relativistic heavy ion reactions with Landau's hydrodynamical model [23,24,25,26,27,28] (for recent applications of this model to relativistic nucleus-nucleus interactions see [29,30,31,32,33,34]). Therefore we will use this simple hydrodynamical picture as a baseline for the model and data comparison.…”

Section: Longitudinal Flowmentioning

confidence: 99%

Longitudinal flow and onset of deconfinement

Bleicher¹,

Petersen²

2007

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

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The effects of the onset of deconfinement on longitudinal and transverse flow are studied. First, we analyze longitudinal pion spectra from E lab = 2A GeV to √ s NN = 200 GeV within Landau's hydrodynamical model and the UrQMD transport approach. From the measured data on the widths of the pion rapidity spectra, we extract the sound velocity c 2 s in the early stage of the reactions. It is found that the sound velocity has a local minimum (indicating a softest point in the equation of state, EoS) at E beam = 30A GeV. This softening of the EoS is compatible with the assumption of the formation of a mixed phase at the onset of deconfinement. Furthermore, the energy excitation function of elliptic flow (v 2 ) from E beam = 90A MeV to √ s NN = 200 GeV is explored within the UrQMD framework and discussed in the context of the available data. The transverse flow should also be sensitive to changes in the equation of state. Therefore, the underestimation of elliptic flow by the UrQMD model calculation above E lab = 30A GeV might also be explained by assuming a phase transition from a hadron gas to the quark gluon plasma around this energy. This would be consistent with the model calculations, indicating a transition from hadronic matter to "string matter" in this energy range. Critical Point and Onset of Deconfinement

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“…Our main goal with this modification is to explore the phenomenological consequences in the forward rapidity region where the effect of early-time anisotropies are expected to be maximal. We are not attempting to describe the physics of the forward rapidity region from first principles, 5 instead, we implement a Gaussian fit profile for the rapidity dependence which successfully describes experimentally observed pion rapidity spectra from AGS to RHIC energies [25,26,27,28,29] and use this to extrapolate to LHC energies:…”

Section: Interpolating Model For Collisionally Broadened Expansionmentioning

confidence: 99%

Suppression of forward dilepton production from an anisotropic quark–gluon plasma

Martínez

Strickland

2009

Eur. Phys. J. C

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Abstract. We calculate the rapidity dependence of leading-order medium dilepton yields resulting from a quark-gluon plasma which has a local time-dependent anisotropy in momentum space. We present a phenomenological model which includes temporal evolution of the plasma anisotropy parameter, ξ, and the hard momentum scale, p hard . Our model interpolates between 1+1 dimensional collisionallybroadened expansion at early times and 1+1 dimensional ideal hydrodynamic expansion at late times. Using our model, we find that at LHC energies, forward high-energy medium dilepton production would be suppressed by up to a factor of 3 if one assumes an isotropization/thermalization time of 2 fm/c. Therefore, it may be possible to use forward dilepton yields to experimentally determine the time of onset of locally isotropic hydrodynamic expansion of the quark-gluon plasma as produced in ultrarelativistic heavy-ion collisions.

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Untitled

Cited by 122 publications

References 0 publications

SQM 2006: theory summary and perspectives

SQM 2006: theory summary and perspectives

Longitudinal flow and onset of deconfinement

Suppression of forward dilepton production from an anisotropic quark–gluon plasma

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