J/Y Suppression by Quark-Gluon Plasma Formation
J/Y Suppression by Quark-Gluon Plasma Formation
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DOI：
10.2172/1118865
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Matsui
中科院分区：
文献类型：
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作者：
T. Matsui
如果高能重离子碰撞导致热夸克胶子等离子体的形成，那么色屏蔽会阻止cE在相互作用区域的去束缚内部的结合。为了研究这种效应，我们比较了屏蔽半径的温度依赖性，从晶格QCD，与粲偶素模型中计算的J/$半径。本文研究了在双轻子质谱中清楚地探测这种效应的可能性。我们的结论是J/$抑制核碰撞应该提供一个明确的签名夸克胶子等离子体的形成。
If high energy heavy ion collisions lead to the formation of a hot quark-gluon plasma, then colour screening prevents cE binding in the deconhed interior of the interaction region. To study this effect, we compare the temperature dependence of the screening radius, as obtained from lattice QCD, with the J/$ radius calculated in charmonium models. The feasibil-ity to detect this effect clearly in the dilepton mass spectrum is examined. We conclude that J/$ suppression in nuclear collisions should provide an unambiguous signature of quark-gluon plasma formation.