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]

. ZHANG X M, HUANG T, Brandenberger R H. Phys. Rev. , 1998,D58: 0277022. Volovik G E. The Universe in a Helium Droplet . Oxford UniversityPress, 20033. Vachaspati T. Phys. Rev. Lett . , 1992, 68: 1977; Nucl. Phys. ,1993., B397: 6484. NagasawaM, Brandenberger R H. Phys. Lett. , 1999, B467: 2055. Achucarro A, Borrill J, Liddle A. Phys. Rev. Lett. , 1999, 82: 37426. Brandenberger R H, ZHANG X M. Phys. Rev. , 1999, D59: 0813017. Rder D, Ruppert J, Rischke D H. Phys. Rev. , 2003, D68: 0160038. Pisarski R D, Wilczek F. Phys. Rev. , 1984, D29: 3389. Zurek W H. Nature, 1985, 317: 505; Phys. Rep. , 1996, 276: 17710. Kibble T W B. J. Phys. , 1976, A9: 138711. Heinz U. Nucl. Phys. , 2001, A685: 414c12. Braun..Munzinger P. Nucl. Phys. , 1999, A661: 261c13. Bjorken J D. Phys. Rev. , 1983, D27: 14014. Hung C M, Shuryak E. Phys. Rev. , 1998, C57: 1891; SchnedermannE, Heinz U. Phys. Rev. , 1993, C47: 173815. ZHUANG P, YANG Z. Phys. Rev. , 2001, D63: 01600416. Eltsov V B, Krusius M, Volovik G E. condmat/ 980912517. Brandenberger R H. Int. J. Mod. Phys. , 1994, A9: 211718. Vachaspat i T, Vilenkin A. Phys. Rev. , 1984, D30: 203619. NagasawaM, Brandenberger R H. Phys. Rev. , 2003, D67: 04350420. Yamaguchi M, Kawasaki M, Yokoyama J. Phys. Rev. Lett . , 1999,82: 457821. Stephanov M, Rajagopal K, Shuryak E. Phys. Rev. , 1999, D60:114028

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[2]	LI Zhu-Xia , ZHANG Ying-Xun , LI Qing-Feng , ZHAO Kai , WU Xi-Zhen . Isospin Effect in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2004, 28(12): 1343-1348.
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[8]	ZHAO Qiang , LIU JianYe , ZHANG FengShou , WANG ShunJin , ZUO Wei , CHEN LieWen . Isospin Effect in Multifragmentation Process of Heavy Ion Collisions at Intermediate Energy. Chinese Physics C, 2000, 24(11): 1024-1029.
[9]	Chen Liewen , Zhang Fengshou , Jin Genming . Isospin Effects on Balance Energy in HIC at Intermediate Energies. Chinese Physics C, 1999, 23(5): 469-474.
[10]	Chen Liewen , Zhang Fengshou , Zeng Xianghua . Finite Range Effects of Local Interactionin Intermediate Energy HIC. Chinese Physics C, 1998, 22(6): 538-544.
[11]	Chen Liewen , Zhang Fengshou , Zeng Xianghua , Jin Genming . Isospin Effects on Collective Flow in HIC at Intermediate Energies. Chinese Physics C, 1998, 22(11): 1035-1041.
[12]	Liu Hang , Liu Jianye , Li Junqing . Study of the Structure Effect in Fragment Formation Process in HIC. Chinese Physics C, 1996, 20(8): 723-728.
[13]	Zhuang Pengfei , Liu Lianshou . Linear Background and Nonlinear Effect in Relativistic Heavy Ion Collisions. Chinese Physics C, 1994, 18(2): 143-147.
[14]	Zhu Quanling , Ge Lingxiao , Zhang Xiaodong . Isospin Effects on Dynamics of Heavy Ion Collisions. Chinese Physics C, 1994, 18(9): 853-857.
[15]	LIU Bo , ZHAO Wei-Qin . Rapidity Distributions of E_T and n in RHIC and the Effect of Secondary Collisions. Chinese Physics C, 1991, 15(6): 543-548.
[16]	LIU Jian-Ye , GE Yu-Cheng , GE Ling-Xiao . The Medium Effects in Dynamics Processes of the Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 1991, 15(1): 71-79.
[17]	ZHUANG Pen-Fei , LIU Lian-Shou . TARGET MASS DEPENDENCE AND NON-LINEAR EFFECTS IN HIGH ENERGY HEAVY ION COLLISIONS. Chinese Physics C, 1990, 14(3): 240-246.
[18]	LI Jun-Qing , ZHU Jie-Ding , LIU Jan-Ye , ZHU Yong-Tai . MASS DRIFT FLUCTUATION AND THE SHELL EFFECT IN HEAVY ION COLLISIONS. Chinese Physics C, 1988, 12(1): 109-115.
[19]	LIU Jian-Ye , LI Jun-Qing , QIAO Wei-Min , CHEN Pei-Jun , SHEN Wen-Qing , TAN Nan-Hong . THE SHELL EFFECTS IN HEAVY ION COLLISIONS FOR LOW BOBARDMENT ENERGIES. Chinese Physics C, 1988, 12(6): 840-847.
[20]	GE Ling-Xiao , LIU Jian-Ye , WANG Shun-Jin . TWO-BODY EFFECT IN HEAVY ION COLLISION. Chinese Physics C, 1987, 11(5): 695-698.

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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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