Interferometry Signatures for QCD First-Order Phase Transition in High Energy Heavy Ion Collisions
YU Li-Li1, M. J. Efaaf2, ZHANG Wei-Ning1,2,3
1Department of Physics, Harbin Institute of Technology, Harbin 1500062School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 1160243Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
Interferometry Signatures for QCD First-Order Phase Transition in High Energy Heavy Ion Collisions
YU Li-Li1, M. J. Efaaf2, ZHANG Wei-Ning1,2,3
1Department of Physics, Harbin Institute of Technology, Harbin 1500062School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 1160243Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
摘要Using the technique of quantum transport of the interfering pair we examine the Hanbury-Brown-Twiss (HBT) interferometry signatures for the particle-emitting sources of pions and kaons produced in heavy ion collisions at 10-30 AGeV. The evolution of the sources is described by relativistic hydrodynamics with the first-order phase transition from quark-gluon plasma (QGP) to hadronic matter. We use quantum probability amplitudes in a path-integral formalism to calculate the two-particle correlation functions, where the effects of particle decay and multiple scattering are taken into consideration. Our model-calculated results indicate that both the HBT radii of pions and kaons increase with the system initial energy density. The HBT lifetimes of the pion and kaon sources increase significantly when the initial energy density is tuned to the phase boundary between the QGP and mixed phase. This increase of HBT lifetimes will likely appear in heavy ion collisions with an incident energy between 10-30 AGeV.
Abstract：Using the technique of quantum transport of the interfering pair we examine the Hanbury-Brown-Twiss (HBT) interferometry signatures for the particle-emitting sources of pions and kaons produced in heavy ion collisions at 10-30 AGeV. The evolution of the sources is described by relativistic hydrodynamics with the first-order phase transition from quark-gluon plasma (QGP) to hadronic matter. We use quantum probability amplitudes in a path-integral formalism to calculate the two-particle correlation functions, where the effects of particle decay and multiple scattering are taken into consideration. Our model-calculated results indicate that both the HBT radii of pions and kaons increase with the system initial energy density. The HBT lifetimes of the pion and kaon sources increase significantly when the initial energy density is tuned to the phase boundary between the QGP and mixed phase. This increase of HBT lifetimes will likely appear in heavy ion collisions with an incident energy between 10-30 AGeV.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
(Quark deconfinement, quark-gluon plasma production, and phase transitions)
引用本文:
YU Li-Li;M. J. Efaaf;ZHANG Wei-Ning;. Interferometry Signatures for QCD First-Order Phase Transition in High Energy Heavy Ion Collisions[J]. 中国物理快报, 2010, 27(2): 22501-022501.
YU Li-Li, M. J. Efaaf, ZHANG Wei-Ning,. Interferometry Signatures for QCD First-Order Phase Transition in High Energy Heavy Ion Collisions. Chin. Phys. Lett., 2010, 27(2): 22501-022501.
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2010, Vol. 27 
