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arXiv 1901.05976hep-th
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应用磁场熔化全息介子

Melting holographic mesons by applying a magnetic field

Daniel Ávila, Leonardo Patiño

摘要:

在这封信中,我们使用全息方法来证明,一个非常强的磁场降低了介子熔化的温度,并减少了光谱的质量间隙以及它们的质量。因此,存在一个温度范围,在该温度范围内,可以通过施加磁场而不是增加温度来熔化介子。我们把这种效应称为磁介子熔化(MMM),我们能够通过构造一种配置来观察它,这种配置使得有可能应用规范/引力方法来研究夸克-胶子等离子体中的基本自由度,该等离子体受到与高能碰撞中预期的一样强的磁场。这是通过一个10维的背景来实现的,这个背景与磁化等离子体是对偶的,但是允许在其中嵌入D 7-膜。对于这样一个背景的存在,必须存在一个标量场,因此在规范理论中出现了一个2维的标量算符。我们在这里给出了背景的细节和味D 7-膜嵌入其中的细节。由于我们的结果是从规范理论的引力对偶得到的,所以从引力的角度分析也是有趣的。

英文摘要:

In the present letter we use holographic methods to show that a very intense magnetic field lowers the temperature at which the mesons melt and decreases the mass gap of the spectrum along with their masses. Consequently, there is a range of temperatures for which mesons can be melted by applying a magnetic field instead of increasing the temperature. We term this effect Magnetic Meson Melting (MMM), and we are able to observe it by constructing a configuration that makes it possible to apply gauge/gravity methods to study fundamental degrees of freedom in a quark-gluon plasma subject to a magnetic field as intense as that expected in high energy collisions. This is achieved by the confection of a ten-dimensional background that is dual to the magnetized plasma and nonetheless permits the embedding of D7-branes in it. For such a background to exist, a scalar field has to be present and hence a scalar operator of dimension 2 appears in the gauge theory. We present here the details of the background and of the embedding of flavor D7-branes in it. Since our results are obtained from the gravity dual of the gauge theory, the analysis is also interesting from the gravitational perspective.

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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