| QCD手征相变中的π介子增强(英文) |
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| 引用本文： | 徐晓梅,傅永平,李云德.QCD手征相变中的π介子增强(英文)[J].原子核物理评论,2010,27(2):160-163. |
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| 作者姓名： | 徐晓梅 傅永平 李云德 |
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| 作者单位： | 1 云南师范大学物理系, 云南 昆明 650092;2 云南大学物理系, 云南 昆明 650091 |
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| 摘 要： | 讨论了在LHC的Pb-Pb碰撞过程中，如果QGP SU(2)手征相变出现二级相变，那么系统将会有π弦产生，并且π弦最终将衰变为π介子。于是以上效应将导致在低动量区域（p~150—400 MeV）内的π介子增强。对应于不同的冷却温度Tf=130，120，110 MeV，产生于π弦衰变的π介子的数量分别是Nt≈270，150， 60. It is pointed out that if the QGP SU(2) chiral phase transition in the LHC Pb Pb collision process is taken place and the phase transition is in the second order， then pion strings will be formed， and decay. These phenomena lead to the pion enhancement in the low momentum region(p150—400 MeV) and the number of pions produced from pion string decay can be estimated about Nt≈270， 150， 60 for different freeze temperature Tf=130， 120， 110 MeV respectively.
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| 关 键 词： | π弦 线性σ模型 手征相 |
| 收稿时间： | 1900-01-01 |
Pions Enhancement in QCD Chiral Phase Transitions |
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| XU Xiao-mei,FU Yong-ping,LI Yun-de.Pions Enhancement in QCD Chiral Phase Transitions[J].Nuclear Physics Review,2010,27(2):160-163. |
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| Authors: | XU Xiao-mei FU Yong-ping LI Yun-de |
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| Institution: | 1 Department of Physics, Yunnan Normal University, Kunming 650092, China;2 Department of physics, Yunnan University, Kunming 650091, China |
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| Abstract: | It iS pointed out that if the QGP SU(2)chiral phase transition in the LHC Pb-Pb collision process is taken place and the phase transition is in the second order,then pion strings will be formed,and decay.These phenomena lead to the pion enhancement in the low momentum region (P(~-)150-400 MeV)and the number of pions produced from pion string decay can be estimated about Nt≈270,150,60 for different freeze temperature Tf=130,120,110 MeV respectively. |
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| Keywords: | pion string linear sigma model chiral phase transition |
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