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arXiv 0902.1015hep-thhep-ph
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虚光子结构函数与AdS/QCD对应

The Virtual Photon Structure Functions and AdS/QCD Correspondence

Yutaka Yoshida

摘要:

我们从规范/弦对偶性出发研究虚光子结构函数。当Bjorken变量x不小时,对偶弦论中的超引力近似是好的.我们计算了中等x区域中大t Hooft耦合下的虚光子结构函数,并确定了结构函数的x行为。我们还指出,在重力计算中,Callan-Gross关系式F_L=0是一个很好的近似。

英文摘要:

We study the virtual photon structure functions from gauge/string duality. If the Bjorken variable x is not small, supergravity approximation becomes good in dual string theory. We calculate the virtual photon structure functions at large 't Hooft coupling in a moderate x-region and determine x-behavior of the structure functions. We also show that the Callan-Gross relation F_L=0 is satisfied to a good approximation in gravity calculation.

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