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arXiv 0809.5143hep-thhep-phnucl-th
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强耦合等离子体中的重子解离

Baryon Dissociation in a Strongly Coupled Plasma

Chethan Krishnan

摘要:

利用对偶弦论,我们研究了在重子平面上吹的N=4强耦合杨-米尔斯等离子体风中的圆形重子位形,一个夸克与之解离前后的情况.一个足够简单的模型是当重子中有四个夸克时,它能捕捉到许多有趣的特征.作为迈向唯象学的一步,我们比较了有代表性的离解构型,并对它们的能量学和其他性质作了一些评论。我们发现的相关结果包括:以前对其它色单重态得到的屏蔽长度公式L_s T ~(1-v^2)^{1/4}对圆形重子也是稳健的。

英文摘要:

Using the dual string theory, we study a circular baryonic configuration in a wind of strongly coupled N=4 Yang-Mills plasma blowing in the plane of the baryon, before and after a quark has dissociated from it. A simple enough model that captures many interesting features is when there are four quarks in the baryon. As a step towards phenomenology, we compare representative dissociated configurations, and make some comments about their energetics and other properties. Related results that we find include the observation that the screening length formula L_s T ~ (1-v^2)^{1/4} obtained previously for other color singlet configurations, is robust for circular baryons as well.

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