The Effects of the Pion String at Heavy ion Collisions

MAO Hong; LI Yun-De

Chinese Physics C> 2005, Vol. 29> Issue(1) : 36-40

The Effects of the Pion String at Heavy ion Collisions

MAO Hong ^, ,
LI Yun-De

Institute of High Energy Physics,CAD,Beijing 100049,China2 Physics Department,East China Normal University Shanghai,Shanghai 200062,China

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Abstract：
We study the possible signals of the pion string associated with the QCD chiral phase transition in LHC Pb–Pb collision at energy s=5.5 TeV.We follow the Kibble–Zurek mechanism to discuss the production and evolution of the pion string.We will show that if the QCD chiral phase transition really takes place in the LHC Pb-Pb collision process and the phase transition is in the second order,the pion string will be inevitably produced and subsequently decay.The main effect of this phenomenon is that there is a generation of a large number of pions in the final state produced by the decay of the pion string, and these pions are mostly distributed in a low momentum region with p～143MeV; also there are lots of neutral pions distributed in a low momentum region with the mean momentum at p～21MeV.

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[1]

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MAO Hong and LI Yun-De. The Effects of the Pion String at Heavy ion Collisions[J]. Chinese Physics C, 2005, 29(1): 36-40.

MAO Hong and LI Yun-De. The Effects of the Pion String at Heavy ion Collisions[J]. Chinese Physics C, 2005, 29(1): 36-40. shu

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Received: 2004-06-30
Revised: 1900-01-01

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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

The Effects of the Pion String at Heavy ion Collisions

Corresponding author: MAO Hong,

Institute of High Energy Physics,CAD,Beijing 100049,China2 Physics Department,East China Normal University Shanghai,Shanghai 200062,China

Received Date: 2004-06-30

Accepted Date: 1900-01-01

Available Online: 2005-01-05

Abstract: We study the possible signals of the pion string associated with the QCD chiral phase transition in LHC Pb–Pb collision at energy s=5.5 TeV.We follow the Kibble–Zurek mechanism to discuss the production and evolution of the pion string.We will show that if the QCD chiral phase transition really takes place in the LHC Pb-Pb collision process and the phase transition is in the second order,the pion string will be inevitably produced and subsequently decay.The main effect of this phenomenon is that there is a generation of a large number of pions in the final state produced by the decay of the pion string, and these pions are mostly distributed in a low momentum region with p～143MeV; also there are lots of neutral pions distributed in a low momentum region with the mean momentum at p～21MeV.

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The Effects of the Pion String at Heavy ion Collisions

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通讯作者: 陈斌, bchen63@163.com

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