UrQMD calculations of two-pion HBT correlations in central Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

Abstract

Two-pion Hanbury-Brown-Twiss (HBT) correlations for central Pb-Pb collisions at the Large-Hadron-Collider (LHC) energy of $\sqrt{s_{NN}}=2.76$ TeV are investigated for the first time with the microscopic transport model UrQMD (Ultra-relativistic Quantum Molecular Dynamics). The transverse momentum dependence of the Pratt-Bertsch HBT radii is extracted from a three dimensional Gaussian fit to the correlator in the longitudinal co-moving system (LCMS). Qualitative agreement with the ALICE data is obtained, however $R_{out}$ is overpredicted by nearly 50%. The LHC results are also compared to data from the STAR experiment at RHIC. For both energies we find that the calculated $R_O/R_S$ ratio is always larger than data, indicating that the emission in the model is less explosive than observed in the data.

11 pages, 3 figures, wording improvements, updated references

References in corpus (8)

• PYTHIA 6.4 Physics and Manual
• The Physics of Ultraperipheral Collisions at the LHC
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• An effective chiral Hadron-Quark Equation of State
• The effect of "pre-formed" hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle
• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Charged particle (pseudo-)rapidity distributions in proton+anti-proton/proton+proton and Pb+Pb/Au+Au collisions from SPS to LHC energies from UrQMD
• A model comparison of resonance lifetime modifications, a soft equation of state and non-Gaussian effects on $\pi -\pi$ correlations at FAIR/AGS energies

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• Application of artificial intelligence in the determination of impact parameter in heavy-ion collisions at intermediate energies
• Application of machine learning in the determination of impact parameter in the ${}^{132}$Sn+${}^{124}$Sn system
• ${}^3$H/${}^3$He ratio as a probe of the nuclear symmetry energy at sub-saturation densities
• The effect of internal magnetic field on collective flow in heavy ion collisions at intermediate energies
• Effect of the spin-orbit interaction on flows in heavy-ion collisions at intermediate energies