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

Abstract
HTML
Reference
Related

PDF

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.

References

[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

[1]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun . Isospin Effects in the Isospin Fractionation Process in Intermediate Energy HeavyIon Collisions. Chinese Physics C, 2004, 28(4): 403-407.
[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.
[3]	FENG Sheng-Qin , LIU Lian-Shou . A Study of Mixing Event Method in Relativistic Heavy Ion Collision Experiments. Chinese Physics C, 2003, 27(4): 349-353.
[4]	HU Rong-Jiang , WU He-Yu , JIN Gen-Ming , ZHU Yong-Tai , LI Song-Lin , XIAO Zhi-Gang , WANG Hong-Wei , DUAN Li-Min , LI Zu-Yu , YIN Xu , WANG Su-Fang , ZHANG Bao-Guo , WEI Zhi-Yo , , , . Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2003, 27(11): 990-994.
[5]	GUO Wen-Jun , LIU Jian-Ye , ZUO Wei , XING Yong-Zhong , LI Xi-Guo , LI Zeng-Hua . Isospin Effect of Neutron (Proton) Emission Number in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2002, 26(12): 1264-1270.
[6]	ZHAO Qiang , GUO Wen-Jun , LIU Jian-Ye , ZUO Wei , WANG Shun-Jin . Isospin Dependence of Preequilibrium Nucleon Emission in Intermediate Energy Heavy Ion Collision. Chinese Physics C, 2001, 25(3): 244-250.
[7]	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.
[8]	Chen Liewen , Zhang Fengshou , Jin Genming . Isospin Effects on Balance Energy in HIC at Intermediate Energies. Chinese Physics C, 1999, 23(5): 469-474.
[9]	Chen Liewen , Zhang Fengshou , Zeng Xianghua . Finite Range Effects of Local Interactionin Intermediate Energy HIC. Chinese Physics C, 1998, 22(6): 538-544.
[10]	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.
[11]	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.
[12]	Zhuang Pengfei , Liu Lianshou . Linear Background and Nonlinear Effect in Relativistic Heavy Ion Collisions. Chinese Physics C, 1994, 18(2): 143-147.
[13]	Zhu Quanling , Ge Lingxiao , Zhang Xiaodong . Isospin Effects on Dynamics of Heavy Ion Collisions. Chinese Physics C, 1994, 18(9): 853-857.
[14]	ZHANG Feng-Shou , GE Ling-Xiao . Excitation Energy in Heavy Ion Collisions. Chinese Physics C, 1992, 16(7): 666-669.
[15]	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.
[16]	GE Ling-Xiao , ZENG Xiang-Hua , LIU Jian-Ye , ZENG Bao-Sheng . THE EFFECT OF COMPRESSION AND THERMAL EXCITATION FOR FRAGMENTATION DYNAMICS PROCESS OF HIC. Chinese Physics C, 1990, 14(3): 278-281.
[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.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2871)
PDF Downloads(628)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

The Effects of the Pion String at Heavy ion Collisions

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article