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Two-Pion Interferometry for the Granular Sources in Ultrarelativistic Heavy Ion Collisions at the RHIC and the LHC |
| ZHANG Wei-Ning1,2**, YIN Hong-Jie1, REN Yan-Yu2
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1School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024
2Department of Physics, Harbin Institute of Technology, Harbin 150006
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| Cite this article: |
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ZHANG Wei-Ning, YIN Hong-Jie, REN Yan-Yu 2011 Chin. Phys. Lett. 28 122501 |
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Abstract We investigate the two-pion interferometry in ultrarelativistic heavy ion collisions in the granular source model of quark-gluon plasma droplets. The pion transverse momentum spectra and HBT radii of the granular sources agree well with the experimental data of the most central Au-Au collisions at (sNN)1/2=200 GeV at the RHIC and Pb−Pb collisions at (sNN)1/2=2.76 TeV at the LHC. In the granular source model the larger initial system breakup time for the LHC collisions as compared to the RHIC collisions may lead to the larger HBT radii Rout, Rside and Rlong. However, the large droplet transverse expansion and limited average relative emitting time of particles in the granular source lead to slightly smaller ratios of the transverse Hanbury–Brown–Twiss radii Rout/Rside.
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| Keywords:
25.75.-q
25.75.Gz
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Received: 18 August 2011
Published: 29 November 2011
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| PACS: |
25.75.-q
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(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))
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25.75.Gz
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(Particle correlations and fluctuations)
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