Analysis of charged hadron multiplicity distributions at RHIC

XIONG Wei; FENG Sheng-Qin

doi:10.1088/1674-1137/32/8/010

Chinese Physics C> 2008, Vol. 32> Issue(8) : 639-644 DOI: 10.1088/1674-1137/32/8/010

Analysis of charged hadron multiplicity distributions at RHIC

XIONG Wei ,
FENG Sheng-Qin ^,

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Abstract：
It is demonstrated that with Heinz's collective flow model charged particle distributions at AGS and lower SPS energies (less than 20 GeV/n) , can successfully be analyzed, but that the model fails for the RHIC data. Heinz's model calculation underestimates the tails of the charged particle distributions from RHIC, the discrepancy becoming bigger as the energy increases. To study the multiplicity distributions at RHIC we develop the so-called "Thermalization Component Model'', which is based on Heinz's collective flow model. It is realized that the limitation of phase space of collective flow can be reflected in that of the thermalization region. By comparing the contributions of particle production from the thermalization regions at different energies and different centralities, we can deepen our understanding of the features of collective motion at RHIC.

References

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XIONG Wei and FENG Sheng-Qin. Analysis of charged hadron multiplicity distributions at RHIC[J]. Chinese Physics C, 2008, 32(8): 639-644. doi: 10.1088/1674-1137/32/8/010

XIONG Wei and FENG Sheng-Qin. Analysis of charged hadron multiplicity distributions at RHIC[J]. Chinese Physics C, 2008, 32(8): 639-644. doi: 10.1088/1674-1137/32/8/010 shu

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Received: 2007-10-04
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of charged hadron multiplicity distributions at RHIC

Corresponding author: FENG Sheng-Qin,

Received Date: 2007-10-04

Accepted Date: 2008-01-22

Available Online: 2008-08-05

Abstract:

It is demonstrated that with Heinz's collective flow model charged particle distributions at AGS and lower SPS energies (less than 20 GeV/n) , can successfully be analyzed, but that the model fails for the RHIC data. Heinz's model calculation underestimates the tails of the charged particle distributions from RHIC, the discrepancy becoming bigger as the energy increases. To study the multiplicity distributions at RHIC we develop the so-called "Thermalization Component Model'', which is based on Heinz's collective flow model. It is realized that the limitation of phase space of collective flow can be reflected in that of the thermalization region. By comparing the contributions of particle production from the thermalization regions at different energies and different centralities, we can deepen our understanding of the features of collective motion at RHIC.

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Analysis of charged hadron multiplicity distributions at RHIC

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