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arXiv 1802.02084hep-ph
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在有磁场的等离子体中重介子的离解

Heavy meson dissociation in a plasma with magnetic fields

Nelson R. F. Braga, Luiz F. Ferreira

摘要:

在重离子碰撞之后检测到的重矢量介子的分数提供了关于等离子体状态的可能形成的信息。估算等离子体中重介子离解度的一个有趣的框架是全息方法。最近的研究表明,热介质中粲偶素和底偶素态的热行为从全息自下而上模型中得到了一致的描述。在这种新方法中的一个关键因素是适当的衰变常数的描述,因为它们与有限温度谱函数的准粒子峰的高度。本文推广了这个新的全息模型,以研究磁场对重介子热谱的影响。其动机是,非常大的磁场存在于非中心重离子碰撞,这可能意味着在离解的情况下的变化。在不同温度和不同的$e B$磁场下,得到了$ c \bar c$和$ b \bar b \, $ S波态的热谱.

英文摘要:

The fraction of heavy vector mesons detected after a heavy ion collision provides information about the possible formation of a plasma state. An interesting framework for estimating the degree of dissociation of heavy mesons in a plasma is the holographic approach. It has been recently shown that a consistent picture for the thermal behavior of charmonium and bottomonium states in a thermal medium emerges from holographic bottom up models. A crucial ingredient in this new approach is the appropriate description of decay constants, since they are related to the heights of the quasiparticle peaks of the finite temperature spectral function. Here we extend this new holographic model in order to study the effect of magnetic fields on the thermal spectrum of heavy mesons. The motivation is that very large magnetic fields are present in non central heavy ion collisions and this could imply a change in the dissociation scenario. The thermal spectra of $ c \bar c$ and $ b \bar b \, $ S wave states is obtained for different temperatures and different values of the magnetic $e B$ field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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